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Büchele F, Mahendran S, Uhl M, Freudinger C, Maric A, Heeb NS, Oertel MF, Baumann CR, Stieglitz LH. Impact of target depth on safety and efficacy outcomes in MR-guided focused ultrasound thalamotomy for tremor patients. J Neurosurg 2024; 140:1451-1458. [PMID: 37922562 DOI: 10.3171/2023.8.jns23472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 08/02/2023] [Indexed: 11/07/2023]
Abstract
OBJECTIVE Target depth, defined by the z-coordinate in the dorsoventral axis relative to the anterior commissure-posterior commissure axial plane of the MR-guided focused ultrasound (MRgFUS) lesion, is considered to be critical for tremor improvement and the occurrence of side effects such as gait impairment. However, although different z-coordinates are used in the literature, there are no comparative studies available with information on optimal lesion placement. This study aimed to compare two different MRgFUS lesion targets (z = +2 mm vs z = 0 mm) regarding efficacy and safety outcomes. METHODS The authors conducted a retrospective analysis of 52 patients with pharmacoresistant tremor disorders who received unilateral MRgFUS thalamotomy in the ventral intermediate nucleus for the first time between 2017 and 2022 by one neurosurgeon, with two different z-coordinates, either z = +2 mm (+2-mm group; n = 17) or z = 0 mm (0-mm group; n = 35), but otherwise identical parameters. Standardized video-recorded assessments of efficacy (including the Washington Heights-Inwood Genetic Study of Essential Tremor scale) and safety (using a standardized grading system) outcomes at baseline and at 6 months posttreatment were reviewed and compared. Moreover, overall patient satisfaction was extracted as documented by the examiner at 6 months. RESULTS Based on a multiple logistic regression analysis, the authors found that a more dorsal target with a z-coordinate of +2 mm as compared with 0 mm was associated with a higher incidence of any persistent side effect at 6 months (p = 0.02). Most consistently, sensory disturbances, although mild and nondisturbing in most cases, occurred more frequently in the +2-mm group (35% vs 11%, p = 0.007), while no significant differences were found for gait impairment (29% vs 35%) and arm ataxia (24% vs 11%). On the other hand, average tremor suppression was similar (63.6% vs 60.2%) between the groups. Here, higher efficacy was associated with a higher side effect burden in the 0-mm group but not in the +2-mm group. Despite the occurrence of side effects, general patient satisfaction was high (87% would undergo MRgFUS again) as most patients valued tremor suppression more. CONCLUSIONS A more ventral MRgFUS target of z = 0 mm seems to be associated with a more favorable safety and a comparable efficacy profile as compared with a more dorsal target of z = +2 mm, but prospective studies are warranted.
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Affiliation(s)
- Fabian Büchele
- Departments of1Neurology and
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | - Sujitha Mahendran
- Departments of1Neurology and
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | - Mechtild Uhl
- Departments of1Neurology and
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | - Carola Freudinger
- Departments of1Neurology and
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | - Angelina Maric
- Departments of1Neurology and
- 3Clinical Neuroscience Center, University Hospital Zürich; and
- 4University of Zürich, Switzerland
| | - Nicole Sarangi Heeb
- 2Neurosurgery, University Hospital Zürich
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | - Markus Florian Oertel
- 2Neurosurgery, University Hospital Zürich
- 3Clinical Neuroscience Center, University Hospital Zürich; and
| | | | - Lennart Henning Stieglitz
- 2Neurosurgery, University Hospital Zürich
- 3Clinical Neuroscience Center, University Hospital Zürich; and
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Levi V, Stanziano M, Pinto C, Zibordi F, Fedeli D, Caldiera V, Cilia R, Golfrè Andreasi N, Braccia A, Carozzi C, Ciceri E, Grisoli M, Gemma M, Nazzi V, DiMeco F, Eleopra R, Zorzi G. Bilateral Simultaneous Magnetic Resonance-Guided Focused Ultrasound Pallidotomy for Life-Threatening Status Dystonicus. Mov Disord 2024. [PMID: 38641910 DOI: 10.1002/mds.29811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/21/2024] Open
Abstract
BACKGROUND Invasive treatments like radiofrequency stereotactic lesioning or deep brain stimulation of the globus pallidus internus can resolve drug-resistant status dystonicus (SD). However, these open procedures are not always feasible in patients with SD. OBJECTIVE The aim was to report the safety and efficacy of simultaneous asleep bilateral transcranial magnetic resonance-guided focused ultrasound (MRgFUS) pallidotomy for life-threatening SD. METHODS We performed bilateral simultaneous MRgFUS pallidotomy under general anesthesia in 2 young patients with pantothenate kinase-associated neurodegeneration and GNAO1 encephalopathy. Both patients had medically refractory SD and severe comorbidities contraindicating open surgery. RESULTS SD resolved at 4 and 12 days after MRgFUS, respectively. Adverse events (intraoperative hypothermia and postoperative facial paralysis) were mild and transient. CONCLUSION Bilateral simultaneous MRgFUS pallidotomy under general anesthesia is safe and may be a valid alternative therapeutic option for fragile patients. Further studies are needed to assess long-term efficacy of the procedure. © 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Vincenzo Levi
- Functional Neurosurgery Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Mario Stanziano
- Neuroradiology Unit, Diagnostic and Technology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Carmela Pinto
- Intensive Care Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Federica Zibordi
- Child Neuropsychiatry Movement Disorders Unit, Pediatric Neuroscience Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Davide Fedeli
- Neuroradiology Unit, Diagnostic and Technology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Valentina Caldiera
- Neuroradiology Unit, Diagnostic and Technology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Interventional Neuroradiology Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberto Cilia
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nico Golfrè Andreasi
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Arianna Braccia
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Carla Carozzi
- Intensive Care Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Elisa Ciceri
- Neuroradiology Unit, Diagnostic and Technology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Interventional Neuroradiology Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marina Grisoli
- Neuroradiology Unit, Diagnostic and Technology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marco Gemma
- Intensive Care Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Vittoria Nazzi
- Functional Neurosurgery Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco DiMeco
- Functional Neurosurgery Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Roberto Eleopra
- Functional Neurosurgery Unit, Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Giovanna Zorzi
- Child Neuropsychiatry Movement Disorders Unit, Pediatric Neuroscience Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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3
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Arcadi A, Aviles-Olmos I, Gonzalez-Quarante LH, Gorospe A, Jiménez-Huete A, de la Corte MM, Parras O, Martin-Bastida A, Riverol M, Villino R, Guridi J, Rodríguez-Oroz MC. Magnetic Resonance-Guided Focused Ultrasound ( MRgFUS)-Thalamotomy for Essential Tremor: Lesion Location and Clinical Outcomes. Mov Disord 2024. [PMID: 38616324 DOI: 10.1002/mds.29801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 03/13/2024] [Accepted: 03/18/2024] [Indexed: 04/16/2024] Open
Abstract
BACKGROUND Factors predicting clinical outcomes after MR-guided focused ultrasound (MRgFUS)-thalamotomy in patients with essential tremor (ET) are not well known. OBJECTIVE To examine the clinical outcomes and their relationship with patients' baseline demographic and clinical features and lesion characteristics at 6-month follow-up in ET patients. METHODS A total of 127 patients were prospectively evaluated at 1 (n = 122), 3 (n = 102), and 6 months (n = 78) after MRgFUS-thalamotomy. Magnetic resonance imaging (MRI) was obtained at 6 months (n = 60). Primary outcomes included: (1) change in the Clinical Rating Scale of Tremor (CRST)-A+B score in the treated hand and (2) frequency and severity of adverse events (AEs) at 6 months. Secondary outcomes included changes in all subitems of the CRST scale in the treated hand, CRST-C, axial tremor (face, head, voice, tongue), AEs, and correlation of primary outcomes at 6 months with lesion characteristics. Statistical analysis included linear mixed, standard, and logistic regression models. RESULTS Scores for CRST-A+B, CRST-A, CRST-B in the treated hand, CRST-C, and axial tremor were improved at each evaluation (P < 0.001). Five patients had severe AEs at 1 month that became mild throughout the follow-up. Mild AEs occurred in 71%, 45%, and 34% of patients at 1, 3, and 6 months, respectively. Lesion volume was associated with the reduction in the CRST-A (P = 0.003) and its overlapping with the ventralis intermedius nucleus (Vim) nucleus with the reduction in CRST-A+B (P = 0.02) and CRST-B (P = 0.008) at 6 months. CONCLUSIONS MRgFUS-thalamotomy improves hand and axial tremor in ET patients. Transient and mild AEs are frequent. Lesion volume and location are associated with tremor reduction. © 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Alana Arcadi
- Neurosurgery Department, Clínica Universidad de Navarra, Pamplona, Spain
| | - Iciar Aviles-Olmos
- Neurology Department, Clínica Universidad de Navarra, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
| | | | - Arantza Gorospe
- Neurology Department, Clínica Universidad de Navarra, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
| | | | | | - Olga Parras
- Hospital Universitario Alava, Vitoria-Gasteiz, Spain
| | | | - Mario Riverol
- Neurology Department, Clínica Universidad de Navarra, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
| | - Rafael Villino
- Neurology Department, Clínica Universidad de Navarra, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
| | - Jorge Guridi
- Neurosurgery Department, Clínica Universidad de Navarra, Pamplona, Spain
| | - Maria C Rodríguez-Oroz
- Neurology Department, Clínica Universidad de Navarra, Pamplona, Spain
- Navarra Institute for Health Research (IdiSNA), Pamplona, Spain
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Morabito R, Cammaroto S, Militi A, Smorto C, Anfuso C, Lavano A, Tomasello F, Di Lorenzo G, Brigandì A, Sorbera C, Bonanno L, Ielo A, Vatrano M, Marino S, Cacciola A, Cerasa A, Quartarone A. The Role of Treatment-Related Parameters and Brain Morphology in the Lesion Volume of Magnetic-Resonance-Guided Focused Ultrasound Thalamotomy in Patients with Tremor-Dominant Neurological Conditions. Bioengineering (Basel) 2024; 11:373. [PMID: 38671794 PMCID: PMC11047844 DOI: 10.3390/bioengineering11040373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/04/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
PURPOSE To determine the best predictor of lesion volume induced by magnetic resonance (MR)-guided focused ultrasound (MRgFUS) thalamotomy in patients with tremor-dominant symptoms in Parkinson's disease (PD) and essential tremor (ET) patients. METHODS Thirty-six neurological patients with medication-refractory tremor (n°19 PD; n°17 ET) were treated using a commercial MRgFUS brain system (Exablate Neuro 4000, Insightec) integrated with a 1.5 T MRI unit (Sigma HDxt; GE Medical System). Linear regression analysis was used to determine how the demographic, clinical, radiological (Fazekas scale), volumetric (total GM/WM/CSF volume, cortical thickness), and MRgFUS-related parameters [Skull Density Ratio (SDR), n° of transducer elements, n° of sonications, skull area, maximal energy delivered (watt), maximal power delivered (joule), maximal sonication time delivered, maximal mean temperature reached (T°C_max), accumulated thermal dose (ATD)] impact on ventral intermediate (VIM)-thalamotomy-related 3D volumetric lesions of necrosis and edema. RESULTS The VIM thalamotomy was clinically efficacious in improving the tremor symptoms of all the patients as measured at 1 week after treatment. Multiple regression analysis revealed that T°C_max and n° of transducer elements were the best predictors of the necrosis and edema volumes. Moreover, total WM volume also predicted the size of necrosis. CONCLUSIONS Our study provides new insights into the clinical MRgFUS procedures that can be used to forecast brain lesion size and improve treatment outcomes.
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Affiliation(s)
- Rosa Morabito
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Simona Cammaroto
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Annalisa Militi
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Chiara Smorto
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Carmelo Anfuso
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Angelo Lavano
- Mater Domini University Hospital, Magna Graecia University, 88100 Catanzaro, Italy;
| | | | - Giuseppe Di Lorenzo
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Amelia Brigandì
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Chiara Sorbera
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Lilla Bonanno
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Augusto Ielo
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | | | - Silvia Marino
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
| | - Alberto Cacciola
- Brain Mapping Lab, Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of Messina, 98122 Messina, Italy;
| | - Antonio Cerasa
- S. Anna Institute, 88900 Crotone, Italy;
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), 98164 Messina, Italy
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Arcavacata, Italy
| | - Angelo Quartarone
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (S.C.); (A.M.); (C.S.); (C.A.); (A.B.); (C.S.); (L.B.); (A.I.); (S.M.)
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Long Z, Hesley GK, Lu A, Hangiandreou NJ, Gorny KR, Tiegs-Heiden CA. MRgFUS ablation of a recurrent tenosynovial giant cell tumor in the foot using ExAblate 2100 system in combination with patient immobilization device. Radiography (Lond) 2024; 30:840-842. [PMID: 38574580 DOI: 10.1016/j.radi.2024.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/04/2024] [Accepted: 03/19/2024] [Indexed: 04/06/2024]
Abstract
INTRODUCTION Magnetic Resonance-guided Focused Ultrasound (MRgFUS) treatment for certain anatomy locations can be extremely challenging due to patient positioning and potential motion. This present study describes the treatment of a recurrent tenosynovial giant cell tumor of the plantar forefoot using the ExAblate 2100 system in combination with patient immobilization device. METHODS Prior to the treatment, several patient immobilization devices were investigated. Vacuum cushions were selected and tested for safety and compatibility with the treatment task and the MR environment. RESULTS During the treatment, one vacuum cushion immobilized the patient's right leg in knee flexion and allowed the bottom of the foot to be securely positioned on the treatment window. Another vacuum cushion supported the patient upper body extended outside the scanner bore. 19 sonications were successfully executed. The treatment was judged to be successful. No immediate complications were observed. CONCLUSIONS MRgFUS treatment of a recurrent tenosynovial giant cell tumor of the right plantar forefoot was successful with the use of patient immobilization vacuum cushions. IMPLICATIONS FOR PRACTICE The immobilization system could be utilized to aid future MRgFUS treatment of lesions in challenging anatomic locations. Various sizes of the vacuum cushions are available to potentially better accommodate other body parts and treatment configurations.
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Affiliation(s)
- Z Long
- Department of Radiology, Mayo Clinic, MN, USA.
| | - G K Hesley
- Department of Radiology, Mayo Clinic, MN, USA
| | - A Lu
- Department of Radiology, Mayo Clinic, MN, USA
| | | | - K R Gorny
- Department of Radiology, Mayo Clinic, MN, USA
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Verhagen Metman L, Monje MHG, Obeso JA, Martínez-Fernández R. Focused ultrasound therapy: Back to the future. Parkinsonism Relat Disord 2024; 121:106023. [PMID: 38320923 DOI: 10.1016/j.parkreldis.2024.106023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 01/30/2024] [Indexed: 02/08/2024]
Affiliation(s)
- Leo Verhagen Metman
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Mariana H G Monje
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - José A Obeso
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain; CIBERNED, Instituto Carlos III, Madrid, Spain
| | - Raúl Martínez-Fernández
- HM CINAC (Centro Integral de Neurociencias Abarca Campal), Hospital Universitario HM Puerta del Sur, HM Hospitales, Madrid, Spain; CIBERNED, Instituto Carlos III, Madrid, Spain
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Peters J, Maamary J, Kyle K, Olsen N, Jones L, Bolitho S, Barnett Y, Jonker B, Tisch S. Reply to: Recurrence of Parkinson's Disease Tremor after Focused Ultrasound Thalamotomy? Mov Disord 2024; 39:759-760. [PMID: 38661047 DOI: 10.1002/mds.29756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 02/05/2024] [Indexed: 04/26/2024] Open
Affiliation(s)
- James Peters
- Department of Neurology, St Vincent's Health Network, Sydney, Australia
- School of Medical Sciences, The University of New South Wales, Sydney, Australia
| | - Joel Maamary
- Department of Neurology, St Vincent's Health Network, Sydney, Australia
- School of Medical Sciences, The University of New South Wales, Sydney, Australia
| | - Kain Kyle
- Sydney Neuroimaging Analysis Centre, Brain and Mind Centre, Sydney, Australia
| | - Nick Olsen
- Stats Central, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, Australia
| | - Lyndsey Jones
- Department of Neurology, St Vincent's Health Network, Sydney, Australia
| | - Samuel Bolitho
- Department of Neurology, St Vincent's Health Network, Sydney, Australia
| | - Yael Barnett
- School of Medical Sciences, The University of New South Wales, Sydney, Australia
- Department of Radiology, St Vincent's Health Network, Sydney, Australia
| | - Benjamin Jonker
- School of Medical Sciences, The University of New South Wales, Sydney, Australia
- Department of Neurosurgery, St Vincent's Health Network, Sydney, Australia
| | - Stephen Tisch
- Department of Neurology, St Vincent's Health Network, Sydney, Australia
- School of Medical Sciences, The University of New South Wales, Sydney, Australia
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Visani E, Panzica F, Franceschetti S, Golfrè Andreasi N, Cilia R, Rinaldo S, Rossi Sebastiano D, Lanteri P, Eleopra R. Early cortico-muscular coherence and cortical network changes in Parkinson's patients treated with MRgFUS. Front Neurol 2024; 15:1362712. [PMID: 38585361 PMCID: PMC10995240 DOI: 10.3389/fneur.2024.1362712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/26/2024] [Indexed: 04/09/2024] Open
Abstract
Introduction To investigate cortical network changes using Magnetoencephalography (MEG) signals in Parkinson's disease (PD) patients undergoing Magnetic Resonance-guided Focused Ultrasound (MRgFUS) thalamotomy. Methods We evaluated the MEG signals in 16 PD patients with drug-refractory tremor before and after 12-month from MRgFUS unilateral lesion of the ventralis intermediate nucleus (Vim) of the thalamus contralateral to the most affected body side. We recorded patients 24 h before (T0) and 24 h after MRgFUS (T1). We analyzed signal epochs recorded at rest and during the isometric extension of the hand contralateral to thalamotomy. We evaluated cortico-muscular coherence (CMC), the out-strength index from non-primary motor areas to the pre-central area and connectivity indexes, using generalized partial directed coherence. Statistical analysis was performed using RMANOVA and post hoct-tests. Results Most changes found at T1 compared to T0 occurred in the beta band and included: (1) a re-adjustment of CMC distribution; (2) a reduced out-strength from non-primary motor areas toward the precentral area; (3) strongly reduced clustering coefficient values. These differences mainly occurred during motor activation and with few statistically significant changes at rest. Correlation analysis showed significant relationships between changes of out-strength and clustering coefficient in non-primary motor areas and the changes in clinical scores. Discussion One day after MRgFUS thalamotomy, PD patients showed a topographically reordered CMC and decreased cortico-cortical flow, together with a reduced local connection between different nodes. These findings suggest that the reordered cortico-muscular and cortical-networks in the beta band may represent an early physiological readjustment related to MRgFUS Vim lesion.
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Affiliation(s)
- Elisa Visani
- Epilepsy Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Ferruccio Panzica
- Clinical Engineering, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Silvana Franceschetti
- Neurophysiopathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nico Golfrè Andreasi
- Parkinson and Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberto Cilia
- Parkinson and Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sara Rinaldo
- Functional Neurosurgery Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | | | - Paola Lanteri
- Neurophysiopathology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberto Eleopra
- Parkinson and Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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Vetkas A, Boutet A, Sarica C, Germann J, Gwun D, Yamamoto K, Jung HH, Alkhotani A, Samuel N, Lang S, Conner CR, Elias GJB, Cheyuo C, Chow C, Santyr B, Iorio-Morin C, Yang AZ, Candeias da Silva C, Fasano A, Kalia SK, Lozano AM. Successful magnetic resonance-guided focused ultrasound treatment of tremor in patients with a skull density ratio of 0.4 or less. J Neurosurg 2024; 140:639-647. [PMID: 37657095 DOI: 10.3171/2023.6.jns23171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 06/28/2023] [Indexed: 09/03/2023]
Abstract
OBJECTIVE The use of magnetic resonance-guided focused ultrasound (MRgFUS) for the treatment of tremor-related disorders and other novel indications has been limited by guidelines advocating treatment of patients with a skull density ratio (SDR) above 0.45 ± 0.05 despite reports of successful outcomes in patients with a low SDR (LSDR). The authors' goal was to retrospectively analyze the sonication strategies, adverse effects, and clinical and imaging outcomes in patients with SDR ≤ 0.4 treated for tremor using MRgFUS. METHODS Clinical outcomes and adverse effects were assessed at 3 and 12 months after MRgFUS. Outcomes and lesion location, volume, and shape characteristics (elongation and eccentricity) were compared between the SDR groups. RESULTS A total of 102 consecutive patients were included in the analysis, of whom 39 had SDRs ≤ 0.4. No patient was excluded from treatment because of an LSDR, with the lowest being 0.22. Lesioning temperatures (> 52°C) and therapeutic ablations were achieved in all patients. There were no significant differences in clinical outcome, adverse effects, lesion location, and volume between the high SDR group and the LSDR group. SDR was significantly associated with total energy (rho = -0.459, p < 0.001), heating efficiency (rho = 0.605, p < 0.001), and peak temperature (rho = 0.222, p = 0.025). CONCLUSIONS The authors' results show that treatment of tremor in patients with an LSDR using MRgFUS is technically possible, leading to a safe and lasting therapeutic effect. Limiting the number of sonications and adjusting the energy and duration to achieve the required temperature early during the treatment are suitable strategies in LSDR patients.
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Affiliation(s)
- Artur Vetkas
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Alexandre Boutet
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
- 2Joint Department of Medical Imaging, University of Toronto, Ontario, Canada
| | - Can Sarica
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Jurgen Germann
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Dave Gwun
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Kazuaki Yamamoto
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Hyun Ho Jung
- 3Center for Innovative Functional Neurosurgery, Brain Research Institute, Seoul
- 4Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, South Korea
| | - Afnan Alkhotani
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Nardin Samuel
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Stefan Lang
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Christopher R Conner
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Gavin J B Elias
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Cletus Cheyuo
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Clement Chow
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | - Brendan Santyr
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
- 5Schulich School of Medicine and Dentistry, Western University, London, Ontario
| | | | - Andrew Z Yang
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
| | | | - Alfonso Fasano
- 7Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, University Health Network, Toronto
- 8Department of Medicine, Division of Neurology, University of Toronto
- 9Krembil Research Institute, Toronto
- 10CRANIA, University Health Network and University of Toronto; and
- 11The KITE Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Suneil K Kalia
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
- 9Krembil Research Institute, Toronto
- 10CRANIA, University Health Network and University of Toronto; and
- 11The KITE Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Andres M Lozano
- 1Department of Surgery, Division of Neurosurgery, University Health Network and University of Toronto
- 9Krembil Research Institute, Toronto
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Buzaev IV, Galimova RM, Nabiullina DI, Illarioshkin SN, Zagidullin NS, Safin SM. Magnetic resonance imaging-guided focused ultrasound thalamotomy launch with remote telemedicine international proctorship. Chronic Dis Transl Med 2024; 10:40-50. [PMID: 38450308 PMCID: PMC10914008 DOI: 10.1002/cdt3.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/12/2023] [Accepted: 08/08/2023] [Indexed: 03/08/2024] Open
Abstract
Background COVID-19 limitations have hindered the implementation of new technologies by preventing proctors from coming to the site. We share our first experience of magnetic resonance imaging (MRI)-guided focused ultrasound (MRgFUS) treatment with an international remote online proctorship, and develop and evaluate the methodology of remote MRgFUS proctorship. Methods This single-center, nonrandomized controlled prospective study included 94 patients: 27 with essential tremor (ET) and 67 with tremor-dominant Parkinson's disease (PD). The coming of proctors was impossible, so we arranged for the remote participation of proctors from the United Kingdom, Spain, and Israel. A total of 38 patients (40.4%) received telemedicine-proctored treatment (proctor group) and 56 received their treatment independently (solo group). We used the Clinical Rating Scale for Tremor (CRST) for ET patients and the Unified Parkinson's Disease Rating Scale (UPDRS) Part III for PD patients. Results In patients with ET, success rates were 81.8% (proctor group) and 100% (solo group) (p = 0.22). CRST reduction on the treated side was 71.43% [65.83%; 80.56%] (proctor group) versus 60.87% [53.99; 79.58] (solo group) (p = 0.19). None of the patients showed worsening of tremors within 1 year. In patients with PD, the success rates were 92.6% (proctor group) and 100% (solo group) (p = 0.08). The UPDRS Part III improvement was 30.1% (proctor group) versus 39.9% (solo group) (p = 0.003). The 1-year recurrence rate was 40% (proctor group) and 17.5% (solo group) (p = 0.04). No complications were observed at 6 months. Conclusions We developed a feasible and safe methodology for telemedicine remote online-proctored MRgFUS treatment. No significant difference was observed between the solo and developed remote proctor protocols in terms of complication rate, effect, and long-term results; however, UPDRS Part III improvement was better in the PD solo group. This study demonstrated that the MRgFUS international proctorship can be performed successfully remotely.
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Affiliation(s)
- Igor V. Buzaev
- Department of SurgeryBashkir State Medical UniversityUfaRussia
| | | | - Dinara I. Nabiullina
- Intelligent Neurosurgery Clinic, Ltd.International Medical Center V.S. Buzaev memorialUfaRussia
| | | | | | - Shamil M. Safin
- Department of SurgeryBashkir State Medical UniversityUfaRussia
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11
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Kyle K, Maamary J, Jonker B, Peters J, Barnett Y, Barnett M, D'Souza A, Maller J, Wang C, Tisch S. Consistency is key: influence of skull density ratio distribution on the formation of clinically effective lesions and long-term tremor suppression following treatment with MR-guided focused ultrasound. J Neurosurg 2024; 140:648-656. [PMID: 37657096 DOI: 10.3171/2023.6.jns231153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 06/30/2023] [Indexed: 09/03/2023]
Abstract
OBJECTIVE Skull density ratio (SDR) influences the permeability of the skull to the ultrasound waves used in magnetic resonance-guided focused ultrasound (MRgFUS) for the treatment of tremor. SDR values vary across the skull and the mean value is known to be predictive of sonication thermal increase. The aim of this investigation was to explore the effects of the SDR distribution on clinical outcomes following treatment with MRgFUS. METHODS Data from 61 patients with essential or dystonic tremor treated with MRgFUS targeting the ventral intermediate nucleus (Vim) were retrospectively analyzed. Tremor suppression was assessed using the Clinical Rating Scale for Tremor (CRST) and hand tremor score (HTS). Vim ablation volume was measured on the T1-weighted MR image acquired both at 1 day and 12 months after treatment. The numerical distribution of SDR values measured for each element in the ultrasound transducer was quantified by calculating the mean, standard deviation, skewness, entropy, and kurtosis of the SDR histogram. The effect of the SDR metrics on change in CRST and HTS was examined using a linear mixed-effects model. Additionally, the effect of the regional distribution of SDR values was explored in an element-wise analysis between patients with above- and below-average tremor suppression. RESULTS A significant positive effect was found between SDR kurtosis and improvement in CRST (β = 0.33, p = 0.004) and HTS (β = 0.38, p < 0.001). The effect was found to be significant at 1 month posttreatment (CRST: β = 0.415, p = 0.008; HTS: β = 0.369, p = 0.016), and at the most recent clinical follow-up (CRST: β = 0.395, p < 0.001; HTS: β = 0.386, p < 0.001). One hundred seventy-one significant elements were identified in the element-wise analysis. The mean percentage difference from the mean SDR in these elements was associated with improvement in CRST (β = 0.27, p < 0.008) and HTS (β = 0.27, p < 0.015). Higher SDR kurtosis was associated with increased lesion volume at 12 months (p = 0.040) and less reduction in volume relative to the day-1 lesion volume (p = 0.007). CONCLUSIONS Greater SDR kurtosis was associated with larger, more stable lesions at 12 months posttreatment and increased tremor suppression at long-term follow-up. SDR kurtosis may provide a more meaningful prognostic factor than the mean SDR.
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Affiliation(s)
- Kain Kyle
- 1Brain and Mind Centre, The University of Sydney
- 2Sydney Neuroimaging Analysis Centre, Camperdown
| | - Joel Maamary
- Departments of3Neurology
- 4School of Medicine, University of New South Wales, Sydney
| | - Benjamin Jonker
- 5Neurosurgery, and
- 6Royal Prince Alfred Institute of Academic Surgery, University of Sydney, Camperdown
| | | | - Yael Barnett
- Departments of3Neurology
- 7Medical Imaging, St. Vincent's Hospital, Darlinghurst
| | - Michael Barnett
- 1Brain and Mind Centre, The University of Sydney
- 2Sydney Neuroimaging Analysis Centre, Camperdown
- 8Department of Neurology, Royal Prince Alfred Hospital, Camperdown
| | - Arkiev D'Souza
- 1Brain and Mind Centre, The University of Sydney
- 9Faculty of Medicine and Health Translational Research Collective, University of Sydney, New South Wales; and
| | | | - Chenyu Wang
- 1Brain and Mind Centre, The University of Sydney
- 2Sydney Neuroimaging Analysis Centre, Camperdown
| | - Stephen Tisch
- Departments of3Neurology
- 4School of Medicine, University of New South Wales, Sydney
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Rinaldo S, Cilia R, Leta V, Gammone M, Andreasi NG, Colucci F, Braccia A, Telese R, Poli MF, Levi V, Romito LMA, Ghilemetti F, De Martin E, Fumagalli ML, Epifani F, Prioni S, Amami P, Piacentini S, Elia AE, Devigili G, Nazzi V, Ciceri EFM, Stanziano M, Grisoli M, Caldiera V, Catotti M, DiMeco F, Moreschi GC, Eleopra R. Focused ultrasound therapy in movement disorders: management roadmap toward optimal pathway organization. Front Neurol 2024; 15:1356310. [PMID: 38595849 PMCID: PMC11002896 DOI: 10.3389/fneur.2024.1356310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/12/2024] [Indexed: 04/11/2024] Open
Abstract
MRI-guided focused ultrasound (MRgFUS) lesioning is an innovative, safe and effective treatment which provides an innovative development in the field of minimally invasive stereotactic neurosurgery. Based on the application of focused ultrasound energy under full MR planning and thermal imaging control, unilateral lesioning of the thalamus, subthalamic nucleus, and globus pallidus is indicated for the treatment of movement disorders, including essential tremor, Parkinson's disease, and dystonia. We started to apply this technique in February 2019 for the treatment of patients with movement disorders. The authors developed a diagnostic therapeutic care pathway, which is herewith proposed and applied as an explication of standard clinical practice in use. The project was the result of the application of different methods such as Health Technology Assessment (HTA), Strengths, Weaknesses, Opportunities and Threats analysis (SWOT) and Demin -Plan, Do, Check, Act (PDCA) cycle. The aim of this project was to standardize the MRgFUS diagnostic-therapeutic pathway (DTP), describe its application and the appropriateness of different phases (patient selection, intervention phase and follow-up). Here, we described in detail our experience in the DTP application from 2019 up to now in 610 patients with movement disorders.
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Affiliation(s)
- Sara Rinaldo
- Health Professions Management, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberto Cilia
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Valentina Leta
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Parkinson's Centre of Excellence at King's College Hospital and King's College London, London, United Kingdom
| | - Mariarosaria Gammone
- Health Professions Management, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nico Golfrè Andreasi
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Fabiana Colucci
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Arianna Braccia
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberta Telese
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marco Fusar Poli
- Neuropsychology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Vincenzo Levi
- Functional Neurosurgery Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Luigi Michele Antonio Romito
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco Ghilemetti
- Health Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Elena De Martin
- Health Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | | | - Francesca Epifani
- Neuroradiology Unit, Department of Diagnostic and Technology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sara Prioni
- Neuropsychology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Paolo Amami
- Neuropsychology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sylvie Piacentini
- Neuropsychology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Antonio Emanuele Elia
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Grazia Devigili
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Vittoria Nazzi
- Functional Neurosurgery Unit, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Elisa Francesca Maria Ciceri
- Imaging Radiology and Interventional Neuroradiology, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Mario Stanziano
- Neuroradiology Unit, Department of Diagnostic and Technology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marina Grisoli
- Neuroradiology Unit, Department of Diagnostic and Technology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Valentina Caldiera
- Imaging Radiology and Interventional Neuroradiology, Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marisa Catotti
- Health Professions Management, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco DiMeco
- Department of Neurological Surgery Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
- Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
- Department of Neurological Surgery, Johns Hopkins Medical School, Baltimore, MD, United States
| | | | - Roberto Eleopra
- Parkinson and Movement Disorders Unit, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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13
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Golfrè Andreasi N, Braccia A, Levi V, Rinaldo S, Ghielmetti F, Cilia R, Romito LM, Bonvegna S, Elia AE, Devigili G, Telese R, Colucci F, Bruzzone MG, Messina G, Corradi M, Stanziano M, Caldiera V, Prioni S, Amami P, Fusar Poli M, Piacentini SHMJ, Grisoli M, Ciceri EFM, DiMeco F, Eleopra R. The Optimal Targeting for Focused Ultrasound Thalamotomy Differs between Dystonic and Essential Tremor: A 12-Month Prospective Pilot Study. Mov Disord Clin Pract 2024; 11:69-75. [PMID: 38291839 PMCID: PMC10828621 DOI: 10.1002/mdc3.13911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 10/02/2023] [Accepted: 10/10/2023] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND Magnetic resonance-guided focused ultrasound (MRgFUS) thalamotomy is increasingly used to treat drug-resistant essential tremor (ET). Data on MRgFUS thalamotomy in dystonic tremor (DT) are anecdotal. OBJECTIVES To investigate efficacy, safety, and differences in target coordinates of MRgFUS thalamotomy in DT versus ET. METHODS Ten patients with DT and 35 with ET who consecutively underwent MRgFUS thalamotomy were followed for 12 months. Although in both groups the initial surgical planning coordinates corresponded to the ventralis intermediate (Vim), the final target could be modified intraoperatively based on clinical response. RESULTS Tremor significantly improved in both groups. The thalamic lesion was significantly more anterior in DT than ET. Considering both ET and DT groups, the more anterior the lesion, the lower the odds ratio for adverse events. CONCLUSIONS MRgFUS thalamotomy is safe and effective in DT and ET. Compared to classical Vim coordinates used for ET, more anterior targeting should be considered for DT.
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Affiliation(s)
- Nico Golfrè Andreasi
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Arianna Braccia
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Vincenzo Levi
- Functional Neurosurgery Unit, Department of NeurosurgeryFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Sara Rinaldo
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | | | - Roberto Cilia
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Luigi Michele Romito
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Salvatore Bonvegna
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
- Present address:
Parkinson Institute, ASST Gaetano Pini‐CTOMilanItaly
| | - Antonio Emanuele Elia
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Grazia Devigili
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Roberta Telese
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Fabiana Colucci
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | | | - Giuseppe Messina
- Functional Neurosurgery Unit, Department of NeurosurgeryFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Marta Corradi
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
| | - Mario Stanziano
- Neuroradiology UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
- Neuroscience Department “Rita Levi Montalcini”University of TurinTurinItaly
| | - Valentina Caldiera
- Diagnostic Radiology and Interventional NeuroradiologyFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Sara Prioni
- Clinical Neuropsychology UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Paolo Amami
- Clinical Neuropsychology UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Marco Fusar Poli
- Clinical Neuropsychology UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | | | - Marina Grisoli
- Neuroradiology UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Elisa Francesca Maria Ciceri
- Diagnostic Radiology and Interventional NeuroradiologyFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
| | - Francesco DiMeco
- Department of NeurosurgeryFondazione IRCCS Istituto Neurologico Carlo BestaMilanoItaly
- Department of Oncology and Hemato‐OncologyUniversity of MilanMilanoItaly
- Hunterian Brain Tumor Research LaboratoryDepartment of Neurological Surgery, Johns Hopkins Medical SchoolBaltimoreMarylandUSA
| | - Roberto Eleopra
- Parkinson and Movement Disorders Unit, Department of Clinical NeurosciencesFondazione IRCCS Istituto Neurologico Carlo BestMilanoItaly
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14
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Hvingelby VS, Pavese N. Surgical Advances in Parkinson's Disease. Curr Neuropharmacol 2024; 22:1033-1046. [PMID: 36411569 DOI: 10.2174/1570159x21666221121094343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/24/2022] [Accepted: 10/29/2022] [Indexed: 11/23/2022] Open
Abstract
While symptomatic pharmacological therapy remains the main therapeutic strategy for Parkinson's disease (PD), over the last two decades, surgical approaches have become more commonly used to control levodopa-induced motor complications and dopamine-resistant and non-motor symptoms of PD. In this paper, we discuss old and new surgical treatments for PD and the many technological innovations in this field. We have initially reviewed the relevant surgical anatomy as well as the pathological signaling considered to be the underlying cause of specific symptoms of PD. Subsequently, early attempts at surgical symptom control will be briefly reviewed. As the most well-known surgical intervention for PD is deep brain stimulation, this subject is discussed at length. As deciding on whether a patient stands to benefit from DBS can be quite difficult, the different proposed paradigms for precisely this are covered. Following this, the evidence regarding different targets, especially the subthalamic nucleus and internal globus pallidus, is reviewed as well as the evidence for newer proposed targets for specific symptoms. Due to the rapidly expanding nature of knowledge and technological capabilities, some of these new and potential future capabilities are given consideration in terms of their current and future use. Following this, we have reviewed newer treatment modalities, especially magnetic resonance-guided focused ultrasound and other potential surgical therapies, such as spinal cord stimulation for gait symptoms and others. As mentioned, the field of surgical alleviation of symptoms of PD is undergoing a rapid expansion, and this review provides a general overview of the current status and future directions in the field.
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Affiliation(s)
- Victor S Hvingelby
- Department of Clinical Medicine, Nuclear Medicine and PET Center, Aarhus University, Aarhus, Denmark
| | - Nicola Pavese
- Department of Clinical Medicine, Nuclear Medicine and PET Center, Aarhus University, Aarhus, Denmark
- Clinical Ageing Research Unit, Newcastle Upon Tyne, Newcastle University, United Kingdom
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15
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Tian X, Hu R, He P, Ye J. Efficacy and safety of magnetic resonance-guided focused ultrasound for Parkinson's disease: a systematic review and meta-analysis. Front Neurol 2023; 14:1301240. [PMID: 38146437 PMCID: PMC10749343 DOI: 10.3389/fneur.2023.1301240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/24/2023] [Indexed: 12/27/2023] Open
Abstract
Objective Magnetic resonance imaging-guided focused ultrasound (MRgFUS) is a novel noninvasive treatment for drug-resistant Parkinson's disease (PD) related tremor. This study aims to evaluate MRgFUS's efficacy and safety in PD through a systematic review and meta-analysis, examining pre-and post-treatment MDS-UPDRSIII and/or CRST scores and associated adverse events. Materials and methods We conducted an extensive literature search across PubMed, Embase, Web of Science, and Cochrane Library databases, screening studies based on set criteria and analyzing MDS-UPDRSIII, CRST, and adverse events pre- and post-MRgFUS treatment. Results Out of 468 retrieved articles, 20 studies involving 258 patients, spanning 2014-2023, were included.17 studies indicated significant MDS-UPDRSIII score reductions post-MRgFUS treatment, while 3 showed significant CRST score declines. In the "on" medication state, pooled MDS-UPDRSIII scores at 1, 3, 6, and 12 months were 12.18 (95% CI: 5.83-18.52), 12.10 (95% CI: 8.22-15.97), 14.85 (95% CI: 9.28-20.41), and 20.65 (95% CI: 12.15-29.14) respectively. In the "off" state, scores were 11.45 (95% CI: -3.50-26.40), 14.71 (95% CI: 4.95-24.46), 21.52 (95% CI: 19.28-23.75), and 22.28 (95% CI: 15.26-29.30). Adverse events were typically mild and transient, with speech disturbances, ataxia, and sensory abnormalities being common post-operative neurological complications. Conclusion MRgFUS offers an effective and relatively safe treatment option for patients with drug-resistant PD-related tremor. Systematic review registration https://www.crd.york.ac.uk/prospero/, No. CRD42023428332.
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Affiliation(s)
- Xiaona Tian
- Eighth Clinical School, Guangzhou University of Chinese Medicine, Foshan, China
| | - Rongrui Hu
- Eighth Clinical School, Guangzhou University of Chinese Medicine, Foshan, China
| | - Peicong He
- Eighth Clinical School, Guangzhou University of Chinese Medicine, Foshan, China
| | - Jianhong Ye
- Endocrinology Department, Foshan Hospital of Traditional Chinese Medicine, Foshan, China
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Labate A, Bertino S, Morabito R, Smorto C, Militi A, Cammaroto S, Anfuso C, Tomaiuolo F, Tonin P, Marino S, Cerasa A, Quartarone A. MR-Guided Focused Ultrasound for Refractory Epilepsy: Where Are We Now? J Clin Med 2023; 12:7070. [PMID: 38002683 PMCID: PMC10672423 DOI: 10.3390/jcm12227070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Epilepsy is one of the most common neurological diseases in both adults and children. Despite improvements in medical care, 20 to 30% of patients are still resistant to the best medical treatment. The quality of life, neurologic morbidity, and even mortality of patients are significantly impacted by medically intractable epilepsy. Nowadays, conservative therapeutic approaches consist of increasing medication dosage, changing to a different anti-seizure drug as monotherapy, and combining different antiseizure drugs using an add-on strategy. However, such measures may not be sufficient to efficiently control seizure recurrence. Resective surgery, ablative procedures and non-resective neuromodulatory (deep-brain stimulation, vagus nerve stimulation) treatments are the available treatments for these kinds of patients. However, invasive procedures may involve lengthy inpatient stays for the patients, risks of long-term neurological impairment, general anesthesia, and other possible surgery-related complications (i.e., hemorrhage or infection). In the last few years, MR-guided focused ultrasound (MRgFUS) has been proposed as an emerging treatment for neurological diseases because of technological advancements and the goal of minimally invasive neurosurgery. By outlining the current knowledge obtained from both preclinical and clinical studies and discussing the technical opportunities of this therapy for particular epileptic phenotypes, in this perspective review, we explore the various mechanisms and potential applications (thermoablation, blood-brain barrier opening for drug delivery, neuromodulation) of high- and low-intensity ultrasound, highlighting possible novel strategies to treat drug-resistant epileptic patients who are not eligible or do not accept currently established surgical approaches. Taken together, the available studies support a possible role for lesional treatment over the anterior thalamus with high-intensity ultrasound and neuromodulation of the hippocampus via low-intensity ultrasound in refractory epilepsy. However, more studies, likely conceiving epilepsy as a network disorder and bridging together different scales and modalities, are required to make ultrasound delivery strategies meaningful, effective, and safe.
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Affiliation(s)
- Angelo Labate
- Neurophysiopathology and Movement Disorders Unit, BIOMORF Department, University of Messina, 98124 Messina, Italy;
| | - Salvatore Bertino
- Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy; (S.B.); (F.T.)
| | - Rosa Morabito
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Chiara Smorto
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Annalisa Militi
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Simona Cammaroto
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Carmelo Anfuso
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Francesco Tomaiuolo
- Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy; (S.B.); (F.T.)
| | | | - Silvia Marino
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
| | - Antonio Cerasa
- S.Anna Institute, 88900 Crotone, Italy;
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy, 98164 Messina, Italy
- Pharmacotechnology Documentation and Transfer Unit, Preclinical and Translational Pharmacology, Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende, Italy
| | - Angelo Quartarone
- IRCCS Centro Neurolesi “Bonino Pulejo”, 98124 Messina, Italy; (R.M.); (C.S.); (A.M.); (S.C.); (C.A.); (S.M.); (A.Q.)
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Filippou A, Georgiou A, Nikolaou A, Evripidou N, Damianou C. Advanced software for MRgFUS treatment planning. Comput Methods Programs Biomed 2023; 240:107726. [PMID: 37480647 DOI: 10.1016/j.cmpb.2023.107726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/24/2023]
Abstract
BACKGROUND AND OBJECTIVES Herein, a user-friendly software platform for 3-dimensional Focused Ultrasound treatment planning based on Magnetic Resonance Imaging (MRI) images is presented. METHODS The software directly retrieves and loads MRI images. Various design tools can be used on the MRI images to define the treatment area and the sonication parameters. Based on the treatment plan, the software controls the robotic motion and motion pattern of Magnetic Resonance guided Focused Ultrasound (MRgFUS) robotic systems to execute the treatment procedure. Real-time treatment monitoring is achieved through MRI images and thermometry. The software's functionality and performance were evaluated in both laboratory and MRI environments. Different treatment plans were designed on MRI images and sonications were executed on agar-based phantoms and polymer films. RESULTS Magnetic Resonance (MR) thermometry maps were acquired in the agar-based phantoms. An exceptional agreement was observed between the software-planned treatment area and the lesions produced on the polymer films. CONCLUSIONS The developed software was successfully integrated with the MRI and robotic system controls for performing accurate treatment planning and real-time monitoring during sonications. The software provides an extremely user-friendly interface, while in the future it could be enhanced by providing dynamic modulation of the ultrasonic parameters during the treatment process.
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Affiliation(s)
- Antria Filippou
- Cyprus University of Technology, Department of Electrical Engineering, Computer Engineering, and Informatics, 30 Archbishop Kyprianou Str., Limassol 3036, Cyprus.
| | - Andreas Georgiou
- Cyprus University of Technology, Department of Electrical Engineering, Computer Engineering, and Informatics, 30 Archbishop Kyprianou Str., Limassol 3036, Cyprus
| | - Anastasia Nikolaou
- Cyprus University of Technology, Department of Electrical Engineering, Computer Engineering, and Informatics, 30 Archbishop Kyprianou Str., Limassol 3036, Cyprus.
| | - Nikolas Evripidou
- Cyprus University of Technology, Department of Electrical Engineering, Computer Engineering, and Informatics, 30 Archbishop Kyprianou Str., Limassol 3036, Cyprus.
| | - Christakis Damianou
- Cyprus University of Technology, Department of Electrical Engineering, Computer Engineering, and Informatics, 30 Archbishop Kyprianou Str., Limassol 3036, Cyprus.
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18
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Chua MMJ, Blitz SE, Ng PR, Segar DJ, McDannold NJ, White PJ, Christie S, Hayes MT, Rolston JD, Cosgrove GR. Focused Ultrasound Thalamotomy for Tremor in Parkinson's Disease: Outcomes in a Large, Prospective Cohort. Mov Disord 2023; 38:1962-1967. [PMID: 37539721 DOI: 10.1002/mds.29569] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 08/05/2023] Open
Abstract
BACKGROUND Magnetic resonance guided focused ultrasound (MRgFUS) is United States Food and Drug Administration approved for the treatment of tremor-dominant Parkinson's disease (TdPD), but only limited studies have been described in practice. OBJECTIVES To report the largest prospective experience of unilateral MRgFUS thalamotomy for the treatment of medically refractory TdPD. METHODS Clinical outcomes of 48 patients with medically refractory TdPD who underwent MRgFUS thalamotomy were evaluated. Tremor outcomes were assessed using the Fahn-Tolosa-Marin scale and adverse effects were categorized using a structured questionnaire and clinical exam at 1 month (n = 44), 3 months (n = 34), 1 year (n = 22), 2 years (n = 5), and 3 years (n = 2). Patients underwent magnetic resonance imaging <24 hours post-procedure. RESULTS Significant tremor control persisted at all follow-ups (P < 0.001). All side effects were mild. At 3 months, these included gait imbalance (38.24%), sensory deficits (26.47%), motor weakness (17.65%), dysgeusia (5.88%), and dysarthria (5.88%), with some persisting at 1 year. CONCLUSIONS MRgFUS thalamotomy is an effective treatment for sustained tremor control in patients with TdPD. © 2023 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Melissa M J Chua
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sarah E Blitz
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Patrick R Ng
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - David J Segar
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Nathan J McDannold
- Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - P Jason White
- Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Sarah Christie
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Michael T Hayes
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - John D Rolston
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - G Rees Cosgrove
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Filippou A, Evripidou N, Damianou C. Robotic system for magnetic resonance imaging-guided focused ultrasound treatment of thyroid nodules. Int J Med Robot 2023; 19:e2525. [PMID: 37149886 DOI: 10.1002/rcs.2525] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/09/2023]
Abstract
BACKGROUND Herein, a robotic system offering Magnetic Resonance-guided Focused Ultrasound (MRgFUS) therapy of thyroid nodules was developed. METHODS The robotic system offers linear motion in 2 PC-controlled axes that navigate a 3 MHz single-element focused transducer. The system, through a C-arm structure attaches to the table of Magnetic Resonance Imaging (MRI) scanners and couples to the neck of patients lying in the supine position. The MRI compatibility of the developed system was assessed inside a 3 T scanner. Benchtop and MRI feasibility studies evaluating the heating performance of the system were executed on excised pork tissue and on homogeneous and thyroid model agar-based phantoms. RESULTS The MRI compatibility of the system was successfully established. Grid sonications executed using robotic motion inflicted discrete and overlapping lesions on the excised tissue, while magnetic resonance (MR) thermometry successfully monitored thermal heating in agar-based phantoms. CONCLUSIONS The developed system was found to be efficient with ex-vivo evaluation. The system can perform clinical MRgFUS therapy of thyroid nodules and other shallow targets after further in-vivo evaluation.
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Affiliation(s)
- Antria Filippou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
| | - Nikolas Evripidou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
| | - Christakis Damianou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
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20
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Hu R, He P, Tian X, Guan H. Efficacy and safety of magnetic resonance-guided focused ultrasound for the treatment of osteoid osteoma: A systematic review and meta-analysis. Eur J Radiol 2023; 166:111006. [PMID: 37523874 DOI: 10.1016/j.ejrad.2023.111006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 06/27/2023] [Accepted: 07/21/2023] [Indexed: 08/02/2023]
Abstract
OBJECTIVE Magnetic resonance-guided focused ultrasound (MRgFUS) is a novel noninvasive interventional technique for osteoid osteoma (OO). The purpose of this study was to evaluate the efficacy and safety of MRgFUS in the treatment of OO through a systematic review and meta-analysis of pain scores and post-treatment adverse events before and after MRgFUS treatment. MATERIALS AND METHODS A comprehensive literature search of PubMed, Embase, Web of science, and Cochrane Library databases was conducted to screen the study literature based on inclusion and exclusion criteria to extract and analyze pre- and post-treatment pain score data, success rates (complete pain relief with no recurrence until the last follow-up), recurrence rates, secondary intervention rates, and complications to evaluate the efficacy and/or safety of MRgFUS for OO. RESULTS A total of 113 studies published between 2012 and 2022were collected, resulting in a total sample size of 353 patients. The majority of the studies were prospective and had a follow-up period of 4 weeks or more, and overall, the quality of evidence ranged from low to high. Pain scores at 1 week and 1 month after the merger were 0.62 (9.5% CI:0.28-0.96) and 0.37 (9.5% CI:0.07-0.68), respectively. The success rate of the combination was 92.8% (95% CI: 89.8%-95.7%), the incidence of minor complications (thermal injury at the ablation site) was 0.85%, and no major complications were recorded in any of the included literature. CONCLUSION MRgFUS is an effective procedure that is able to treat pain for patients with OO with satisfying efficacy and safety. PROSPERO No.CRD42023415573.
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Affiliation(s)
- Rongrui Hu
- Eighth Clinical School of Guangzhou University of Chinese Medicine, Foshan, China
| | - Peicong He
- Eighth Clinical School of Guangzhou University of Chinese Medicine, Foshan, China
| | - Xiaona Tian
- Eighth Clinical School of Guangzhou University of Chinese Medicine, Foshan, China
| | - Honggang Guan
- Orthopedic and Traumatology Center, Foshan City Hospital of Traditional Chinese Medicine, Foshan, China.
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21
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Grasso G, Torregrossa F, Noto M, Bruno E, Feraco P, Buscemi F, Bartolotta TV, Gagliardo C. MR-guided focused ultrasound-induced blood-brain barrier opening for brain metastasis: a review. Neurosurg Focus 2023; 55:E11. [PMID: 37527681 DOI: 10.3171/2023.5.focus23227] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/22/2023] [Indexed: 08/03/2023]
Abstract
Although the therapeutic armamentarium for brain metastases (BMs) has been expanded from innovative surgical techniques and radiotherapy to include targeted therapies and immunotherapy, the prognosis of BMs remains poor. Despite the proven efficacy of numerous compounds in preclinical studies, the limited penetration of promising therapeutic agents across the blood-brain barrier (BBB) remains an unaddressed issue. Recently, low-intensity magnetic resonance-guided focused ultrasound (MRgFUS) in combination with microbubbles has been shown to overcome vascular and cellular transport barriers in the brain and tumor microenvironment, resulting in increased drug diffusion and preliminary effective results. Preclinical studies have investigated the increased penetration of many therapeutic agents including doxorubicin, trastuzumab, and ipilimumab into the CNS with promising results. Furthermore, anticancer drugs combined with MRgFUS-induced BBB opening have been demonstrated to improve animal survival and slow tumor progression. Accordingly, the first clinical trial has recently been launched and hopefully the results will provide evidence for the safety and efficacy of drug delivery enhanced by MRgFUS-induced BBB opening in BMs. This review aims to provide an overview of transcranial low-intensity MRgFUS application for BBB disruption and a comprehensive overview of the most relevant evidence in the treatment of BMs.
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Affiliation(s)
- Giovanni Grasso
- 1Department of Biomedicine, Neurosurgical Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo
| | - Fabio Torregrossa
- 1Department of Biomedicine, Neurosurgical Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo
| | - Manfredi Noto
- 1Department of Biomedicine, Neurosurgical Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo
| | - Eleonora Bruno
- 2Department of Biomedicine, Neuroradiology Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo; and
| | - Paola Feraco
- 3Neuroradiology Unit, Santa Chiara Hospital, Trento, Italy
| | - Felice Buscemi
- 1Department of Biomedicine, Neurosurgical Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo
| | - Tommaso Vincenzo Bartolotta
- 2Department of Biomedicine, Neuroradiology Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo; and
| | - Cesare Gagliardo
- 2Department of Biomedicine, Neuroradiology Unit, Neurosciences and Advanced Diagnostics (BiND), University of Palermo; and
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22
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Pearce JJ, Thoma J, Vinson K, Sani S. Treatment of vocal tremor with bilateral magnetic resonance imaging-guided focused ultrasound of the ventral intermediate thalamic nucleus: illustrative case. J Neurosurg Case Lessons 2023; 5:CASE2351. [PMID: 38015018 PMCID: PMC10550546 DOI: 10.3171/case2351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 04/03/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND Essential vocal tremor is a difficult disease entity to treat with a poor response to existing medical management and limited options for surgical management of the disease. Magnetic resonance imaging-guided focused ultrasound (MRgFUS) is an emerging treatment modality with encouraging results for limb tremor in patients with essential tremor, but data are limited for the treatment of vocal tremor. OBSERVATIONS This is the case of a 69-year-old male with a history of essential vocal tremor severely limiting his ability to perform his occupation as an opera singer. He underwent staged bilateral ventral intermediate nucleus of the thalamus thalamotomy with MRgFUS for the treatment of his bilateral upper extremity tremor with near complete resolution of his vocal tremor after a second procedure. LESSONS Bilateral MRgFUS may be a safe and efficacious option for the treatment of essential vocal tremor. Further research into optimal patient selection, precise target location, and treatment parameters is needed.
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Affiliation(s)
- John J. Pearce
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois
| | - Jaclyn Thoma
- Rush University Medical College, Chicago, Illinois; and
| | - Kimberly Vinson
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sepehr Sani
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois
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Taranta V, Saporito G, Ornello R, Splendiani A, Bruno F, Sucapane P, Masciocchi C, Marinangeli F, Cacchio A, Di Cesare E, Pistoia F. Magnetic Resonance-guided Focused Ultrasound thalamotomy for refractory neuropathic pain: a systematic review and critical appraisal of current knowledge. Ther Adv Neurol Disord 2023; 16:17562864231180729. [PMID: 37363184 PMCID: PMC10286169 DOI: 10.1177/17562864231180729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/17/2023] [Indexed: 06/28/2023] Open
Abstract
Background Magnetic Resonance-guided Focused Ultrasound (MRgFUS) is an innovative therapeutical approach for medically refractory tremor. It is currently under investigation for other neurological diseases including refractory neuropathic pain (NP). Objective The objective of this systematic review is to analyze available evidence about the effectiveness and safety profile of MRgFUS in the treatment of refractory NP. Methods Eligible studies were identified by searching published studies in PubMed and Scopus databases from inception to December 2022 and by identifying ongoing studies registered on the clinicaltrials.gov website. The study was registered in PROSPERO (ID: CRD42021277154). Results We found three published observational studies and nine ongoing studies. In published studies, the involved population ranged from 8 to 46 patients with overall 66 patients being included with NP or trigeminal neuralgia. The target lesion was in the posterior part of the central lateral nucleus of the thalamus, bilaterally. Outcomes were assessed at different times through the Visual Analog Scale, showing a variable degree of improvement. Adverse events were rare, mild, and transient (vertigo, paresthesias, and dysesthesias) with intracerebral bleeding being reported as major adverse event in one case only. Among ongoing studies, we found three prospective, randomized, sham-controlled, crossover trials (RCTs) and six observational studies. Inclusion criteria are previous failure of more than three pharmacological treatments and NP duration longer than 6 months. The thalamus is the main proposed target and measured outcomes are accuracy of the procedure and pain relief, with a follow-up period ranging from 1 week to 1 year. Conclusion This systematic review suggests that, although high-quality studies are lacking, available evidence endorses the effectiveness and safety of MRgFUS in the management of NP. Ongoing RCTs will provide more robust data to understand benefits and risks of the procedure. Registration PROSPERO (ID: CRD42021277154).
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Affiliation(s)
- Valentina Taranta
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Gennaro Saporito
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Raffaele Ornello
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Alessandra Splendiani
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Federico Bruno
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | | | - Carlo Masciocchi
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Franco Marinangeli
- Department of Clinical Medicine, Public Health, Life Sciences and Environment Life, University of L’Aquila, L’Aquila, Italy
| | - Angelo Cacchio
- Department of Clinical Medicine, Public Health, Life Sciences and Environment Life, University of L’Aquila, L’Aquila, Italy
| | - Ernesto Di Cesare
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
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Bonosi L, Marino S, Benigno UE, Musso S, Buscemi F, Giardina K, Gerardi R, Brunasso L, Costanzo R, Iacopino DG, Maugeri R. Sonodynamic therapy and magnetic resonance-guided focused ultrasound: new therapeutic strategy in glioblastoma. J Neurooncol 2023; 163:219-238. [PMID: 37179515 DOI: 10.1007/s11060-023-04333-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023]
Abstract
Glioblastoma (GB) is one of the most aggressive and difficult-to-treat brain tumors, with a poor prognosis and limited treatment options. In recent years, sonodynamic therapy (SDT) and magnetic resonance focused ultrasound (MRgFUS) have emerged as promising approaches for the treatment of GB. SDT uses ultrasound waves in combination with a sonosensitizer to selectively damage cancer cells, while MRgFUS delivers high-intensity ultrasound waves to precisely target tumor tissue and disrupt the blood-brain barrier to enhance drug delivery. In this review, we explore the potential of SDT as a novel therapeutic strategy for GB. We discuss the principles of SDT, its mechanisms of action, and the preclinical and clinical studies that have investigated its use in Gliomas. We also highlight the challenges, the limitations, and the future perspectives of SDT. Overall, SDT and MRgFUS hold promise as novel and potentially complementary treatment modalities for GB. Further research is needed to optimize their parameters and determine their safety and efficacy in humans, but their potential for selective and targeted tumor destruction makes them an exciting area of investigation in the field of brain cancer therapy.
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Affiliation(s)
- Lapo Bonosi
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy.
| | - Silvia Marino
- IRCCS Centro Neurolesi Bonino-Pulejo, Messina, Italy
| | - Umberto Emanuele Benigno
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Sofia Musso
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Felice Buscemi
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Kevin Giardina
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Rosamaria Gerardi
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Lara Brunasso
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Roberta Costanzo
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Domenico Gerardo Iacopino
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
| | - Rosario Maugeri
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in NeurologiSurgery, University of Palermo, 90127, Palermo, Italy
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25
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Kyle K, Maller J, Barnett Y, Jonker B, Barnett M, D’Souza A, Calamante F, Maamary J, Peters J, Wang C, Tisch S. Tremor suppression following treatment with MRgFUS: skull density ratio consistency and degree of posterior dentatorubrothalamic tract lesioning predicts long-term clinical outcomes in essential tremor. Front Neurol 2023; 14:1129430. [PMID: 37181561 PMCID: PMC10166854 DOI: 10.3389/fneur.2023.1129430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/27/2023] [Indexed: 05/16/2023] Open
Abstract
Objectives Magnetic resonance-guided focussed ultrasound (MRgFUS) is an incisionless ablative procedure, widely used for treatment of Parkinsonian and Essential Tremor (ET). Enhanced understanding of the patient- and treatment-specific factors that influence sustained long-term tremor suppression could help clinicians achieve superior outcomes via improved patient screening and treatment strategy. Methods We retrospectively analysed data from 31 subjects with ET, treated with MRgFUS at a single centre. Tremor severity was assessed with parts A, B and C of the Clinical Rating Scale for Tremor (CRST) as well as the combined CRST. Tremor in the dominant and non-dominant hand was assessed with Hand Tremor Scores (HTS), derived from the CRST. Pre- and post-treatment imaging data were analysed to determine ablation volume overlap with automated thalamic segmentations, and the dentatorubrothalamic tract (DRTT) and compared with percentage change in CRST and HTS following treatment. Results Tremor symptoms were significantly reduced following treatment. Combined pre-treatment CRST (mean: 60.7 ± 17.3) and HTS (mean: 19.2 ± 5.7) improved by an average of 45.5 and 62.6%, respectively. Percentage change in CRST was found to be significantly negatively associated with age (β = -0.375, p = 0.015), and SDR standard deviation (SDRSD; β = -0.324, p = 0.006), and positively associated with ablation overlap with the posterior DRTT (β = 0.535, p < 0.001). Percentage HTS improvement in the dominant hand decreased significantly with older age (β = -0.576, p < 0.01). Conclusion Our results suggest that increased lesioning of the posterior region of the DRTT could result in greater improvements in combined CRST and non-dominant hand HTS, and that subjects with lower SDR standard deviation tended to experience greater improvement in combined CRST.
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Affiliation(s)
- Kain Kyle
- Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
- Sydney Neuroimaging Analysis Centre, Camperdown, NSW, Australia
| | | | - Yael Barnett
- Department of Medical Imaging, and Neurology, St Vincent’s Hospital, Darlinghurst, NSW, Australia
- Department of Neurology, St Vincent’s Hospital, Darlinghurst, NSW, Australia
| | - Benjamin Jonker
- Department of Neurosurgery, St Vincent’s Hospital, Darlinghurst, NSW, Australia
- Royal Prince Alfred Institute of Academic Surgery, University of Sydney, Camperdown, NSW, Australia
| | - Michael Barnett
- Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
- Sydney Neuroimaging Analysis Centre, Camperdown, NSW, Australia
- Department of Neurology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Arkiev D’Souza
- Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
| | - Fernando Calamante
- Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
- School of Biomedical Engineering, The University of Sydney, Sydney, NSW, Australia
- Sydney Imaging, The University of Sydney, Sydney, NSW, Australia
| | - Joel Maamary
- Department of Neurology, St Vincent’s Hospital, Darlinghurst, NSW, Australia
- School of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - James Peters
- Department of Neurology, St Vincent’s Hospital, Darlinghurst, NSW, Australia
| | - Chenyu Wang
- Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
- Sydney Neuroimaging Analysis Centre, Camperdown, NSW, Australia
| | - Stephen Tisch
- Department of Neurology, St Vincent’s Hospital, Darlinghurst, NSW, Australia
- School of Medicine, University of New South Wales, Sydney, NSW, Australia
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Joutsa J, Lipsman N, Horn A, Cosgrove GR, Fox MD. The return of the lesion for localization and therapy. Brain 2023:7114971. [PMID: 37040563 PMCID: PMC10393408 DOI: 10.1093/brain/awad123] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/11/2023] [Accepted: 03/23/2023] [Indexed: 04/13/2023] Open
Abstract
Historically, pathological brain lesions provided the foundation for localization of symptoms and therapeutic lesions were used as a treatment for brain diseases. New medications, functional neuroimaging and deep brain stimulation led to a decline in lesions in the past few decades. However, recent advances have improved our ability to localize lesion-induced symptoms, including localization to brain circuits rather than individual brain regions. Improved localization can lead to more precise treatment targets, which may mitigate traditional advantages of deep brain stimulation over lesions such as reversibility and tunability. New tools for creating therapeutic brain lesions such as high intensity focused ultrasound allow for lesions to be placed without a skin incision and are already in clinical use for tremor. Although there are limitations and caution is warranted, improvements in lesion-based localization are refining our therapeutic targets and improved technology is providing new ways to create therapeutic lesions, which together may facilitate the return of the lesion.
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Affiliation(s)
- Juho Joutsa
- Turku Brain and Mind Center, Clinical Neurosciences, University of Turku, 20014 Turku, Finland
- Turku PET Centre, Neurocenter, Turku University Hospital, 20520 Turku, Finland
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Nir Lipsman
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
- Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
- Harquail Centre for Neuromodulation, Sunnybrook Research Institute, Toronto, Canada
| | - Andreas Horn
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Movement Disorder and Neuromodulation Unit, Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - G Rees Cosgrove
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Michael D Fox
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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27
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Chang JG, Kim DW, Jung HH, Chang WS, Kim CH, Kim SJ, Chang JW. Evaluation of changes in neural oscillation after bilateral capsulotomy in treatment refractory obsessive-compulsive disorder using magnetoencephalogram. Asian J Psychiatr 2023; 82:103473. [PMID: 36706511 DOI: 10.1016/j.ajp.2023.103473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
Bilateral thermal capsulotomy with magnetic resonance-guided focused ultrasound (MRgFUS-capsulotomy) is a promising treatment option for treatment-refractory obsessive-compulsive disorder (OCD). Herein, we investigated the effects of bilateral thermal capsulotomy with MRgFUS on neural oscillations in treatment-refractory OCD patients. Eight patients underwent resting-state MEG with repeated recordings before and 1 and 6 months after MRgFUS-capsulotomy, and the oscillatory power and phase coherence over the entire cortical sensor area were measured. After MRgFUS-capsulotomy, the high beta band power in the fronto-central and temporal areas decreased at 1 month and remained stable for 6 months. Cortical connectivity of the high beta band gradually decreased over the entire cortical area during the following 6 months. At 1 month, improvement in anxiety and depression symptoms was significantly correlated with changes in high beta band power in both the frontotemporal and temporal areas. The treatment effect of MRgFUS-capsulotomy may be attributed to the cortical high beta band. Our results provide an advanced understanding of the neural mechanisms underlying MRgFUS-capsulotomy and other neuromodulatory interventions for treatment-refractory OCD.
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Affiliation(s)
- Jhin Goo Chang
- Department of Psychiatry, Myongji Hospital, Hanyang University College of Medicine, Goyang, the Republic of Korea.
| | - Do-Won Kim
- School of Healthcare and Biomedical Engineering, Chonnam National University, Yeosu, the Republic of Korea
| | - Hyun Ho Jung
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, the Republic of Korea
| | - Won Seok Chang
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, the Republic of Korea
| | - Chan-Hyung Kim
- Department of Psychiatry, Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, the Republic of Korea
| | - Se Joo Kim
- Department of Psychiatry, Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, the Republic of Korea.
| | - Jin Woo Chang
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, the Republic of Korea.
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Zhang DY, Pearce JJ, Mazza J, Petrosyan E, Borghei A, Patel N, Sani S. Initiating a Magnetic Resonance-Guided Focused Ultrasound Program: Comprehensive Workflow and Lessons Learned from the Initial 116 Cases. Stereotact Funct Neurosurg 2023; 101:101-111. [PMID: 36863325 DOI: 10.1159/000528925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 12/25/2022] [Indexed: 03/04/2023]
Abstract
INTRODUCTION Magnetic resonance-guided focused ultrasound (MRgFUS) represents an incisionless treatment option for essential or parkinsonian tremor. The incisionless nature of this procedure has garnered interest from both patients and providers. As such, an increasing number of centers are initiating new MRgFUS programs, necessitating development of unique workflows to optimize patient care and safety. Herein, we describe establishment of a multi-disciplinary team, workflow processes, and outcomes for a new MRgFUS program. METHODS This is a single-academic center retrospective review of 116 consecutive patients treated for hand tremor between 2020 and 2022. MRgFUS team members, treatment workflow, and treatment logistics were reviewed and categorized. Tremor severity and adverse events were evaluated at baseline, 3, 6, and 12 months post-MRgFUS with the Clinical Rating Scale for Tremor Part B (CRST-B). Trends in outcome and treatment parameters over time were assessed. Workflow and technical modifications were noted. RESULTS The procedure, workflow, and team members remained consistent throughout all treatments. Technique modifications were attempted to reduce adverse events. A significant reduction in CRST-B score was achieved at 3 months (84.5%), 6 months (79.8%), and 12 months (72.2%) post-procedure (p < 0.0001). The most common post-procedure adverse events in the acute period (<1 day) were gait imbalance (61.1%), fatigue and/or lethargy (25.0%), dysarthria (23.2%), headache (20.4%), and lip/hand paresthesia (13.9%). By 12 months, the majority of adverse events had resolved with a residual 17.8% reporting gait imbalance, 2.2% dysarthria, and 8.9% lip/hand paresthesia. No significant trends in treatment parameters were found. CONCLUSIONS We demonstrate the feasibility of establishing an MRgFUS program with a relatively rapid increase in evaluation and treatment of patients while maintaining high standards of safety and quality. While efficacious and durable, adverse events occur and can be permanent in MRgFUS.
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Affiliation(s)
- Daniel Y Zhang
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA,
| | - John J Pearce
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
| | - Jacob Mazza
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
| | - Edgar Petrosyan
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
| | - Alireza Borghei
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
| | - Neepa Patel
- Department of Neurology, Rush University Medical Center, Chicago, Illinois, USA
| | - Sepehr Sani
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
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Bazzocchi A, Aparisi Gómez MP, Taninokuchi Tomassoni M, Napoli A, Filippiadis D, Guglielmi G. Musculoskeletal oncology and thermal ablation: the current and emerging role of interventional radiology. Skeletal Radiol 2023; 52:447-459. [PMID: 36346453 DOI: 10.1007/s00256-022-04213-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 10/05/2022] [Accepted: 10/17/2022] [Indexed: 11/10/2022]
Abstract
The role of interventional radiology (IR) is expanding. With new techniques being developed and tested, this radiology subspecialty is taking a step forward in different clinical scenarios, especially in oncology. Musculoskeletal tumoral diseases would definitely benefit from a low-invasive approach that could reduce mortality and morbidity in particular. Thermal ablation through IR has already become important in the palliation and consolidation of bone metastases, oligometastatic disease, local recurrences, and treating specific benign tumors, with a more tailored approach, considering the characteristics of every patient. As image-guided ablation techniques lower their invasiveness and increase their efficacy while the collateral effects and complications decrease, they become more relevant and need to be considered in patient care pathways and clinical management, to improve outcomes. We present a literature review of the different percutaneous and non-invasive image-guided thermal ablation methods that are currently available and that could in the future become relevant to manage musculoskeletal oncologic diseases.
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Affiliation(s)
- Alberto Bazzocchi
- Diagnostic and Interventional Radiology, IRCCS Istituto Ortopedico Rizzoli, Via G. C. Pupilli 1, 40136, Bologna, Italy.
| | - Maria Pilar Aparisi Gómez
- Department of Radiology, Auckland City Hospital, Auckland, New Zealand.,Department of Radiology, IMSKE, Valencia, Spain
| | - Makoto Taninokuchi Tomassoni
- Diagnostic and Interventional Radiology, IRCCS Istituto Ortopedico Rizzoli, Via G. C. Pupilli 1, 40136, Bologna, Italy
| | - Alessandro Napoli
- Department of Radiological, Oncological and Pathological Sciences, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - Dimitrios Filippiadis
- 2nd Radiology Department, Medical School, University General Hospital "ATTIKON", National and Kapodistrian University of Athens, Athens, Greece
| | - Giuseppe Guglielmi
- Department of Clinical and Experimental Medicine, Foggia University School of Medicine, Foggia, Italy
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30
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Bruno F, Tommasino E, Pertici L, Pagliei V, Gagliardi A, Catalucci A, Arrigoni F, Palumbo P, Sucapane P, Pistoia F, Marini C, Ricci A, Barile A, Di Cesare E, Splendiani A, Masciocchi C. MRgFUS thalamotomy for the treatment of tremor: evaluation of learning curve and operator's experience impact on the procedural and clinical outcome. Acta Neurochir (Wien) 2023; 165:727-33. [PMID: 36763132 DOI: 10.1007/s00701-023-05510-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/16/2023] [Indexed: 02/11/2023]
Abstract
BACKGROUND MRgFUS Vim ablation is increasingly used for the treatment of tremor in ET e PD patients but there is little published research on the importance of operator experience in this procedure. This study aims to evaluate the learning curve and the influence of the operator experience on the procedural and clinical outcomes. METHODS We retrospectively evaluated 90 patients (38 ET, 52 PD) submitted to MRgFUS unilateral thalamotomy in the period between February 2018 and July 2020. Clinical endpoints, procedural times, and technical parameters were recorded in all procedures. Based on the time of treatment, patients were divided into three groups of 30 units each, comparing all variables between each time period group. RESULTS In Group A, the average patient preparation time was 120.6 min, the treatment time was 105.2 min, the number of was sonications 14.1, and the mean target shifts 3.1. In Group B, the mean preparation time was 105.5 min, the treatment time was 89.5 min, the number of sonications was 13.2, and the target shifts 3.0. Group C showed inferior values of preparation time (101.9 min), treatment time (71.7 min), numbers of sonications (10.6), and shifts (1.7). Thalamotomy-related complications occurred in 9 patients of Group A, 2 of Group B, and 5 of Group C. Tremor relapse occurred in 7 patients of Group A, 3 of Group B, and 2 of Group C. The days of hospitalization were comparable in the three groups. CONCLUSIONS The operators experience is associated with the improvement of clinical and procedural outcome in MRgFUS thalatomy for the treatment of ET and PD tremor.
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Zhang X, Greiser S, Roy U, Lange F, van Gorkum R, Fournelle M, Speicher D, Tretbar S, Melzer A, Landgraf L. Evaluation of a Developed MRI-Guided Focused Ultrasound System in 7 T Small Animal MRI and Proof-of-Concept in a Prostate Cancer Xenograft Model to Improve Radiation Therapy. Cells 2023; 12. [PMID: 36766824 DOI: 10.3390/cells12030481] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/17/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023] Open
Abstract
Focused ultrasound (FUS) can be used to physiologically change or destroy tissue in a non-invasive way. A few commercial systems have clinical approval for the thermal ablation of solid tumors for the treatment of neurological diseases and palliative pain management of bone metastases. However, the thermal effects of FUS are known to lead to various biological effects, such as inhibition of repair of DNA damage, reduction in tumor hypoxia, and induction of apoptosis. Here, we studied radiosensitization as a combination therapy of FUS and RT in a xenograft mouse model using newly developed MRI-compatible FUS equipment. Xenograft tumor-bearing mice were produced by subcutaneous injection of the human prostate cancer cell line PC-3. Animals were treated with FUS in 7 T MRI at 4.8 W/cm2 to reach ~45 °C and held for 30 min. The temperature was controlled via fiber optics and proton resonance frequency shift (PRF) MR thermometry in parallel. In the combination group, animals were treated with FUS followed by X-ray at a single dose of 10 Gy. The effects of FUS and RT were assessed via hematoxylin-eosin (H&E) staining. Tumor proliferation was detected by the immunohistochemistry of Ki67 and apoptosis was measured by a TUNEL assay. At 40 days follow-up, the impact of RT on cancer cells was significantly improved by FUS as demonstrated by a reduction in cell nucleoli from 189 to 237 compared to RT alone. Inhibition of tumor growth by 4.6 times was observed in vivo in the FUS + RT group (85.3%) in contrast to the tumor volume of 393% in the untreated control. Our results demonstrated the feasibility of combined MRI-guided FUS and RT for the treatment of prostate cancer in a xenograft mouse model and may provide a chance for less invasive cancer therapy through radiosensitization.
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Yeo SY, Bratke G, Grüll H. High Intensity Focused Ultrasound for Treatment of Bone Malignancies-20 Years of History. Cancers (Basel) 2022; 15:cancers15010108. [PMID: 36612105 PMCID: PMC9817683 DOI: 10.3390/cancers15010108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/28/2022] Open
Abstract
High Intensity Focused Ultrasound (HIFU) is the only non-invasive method for percutaneous thermal ablation of tissue, with treatments typically performed either under magnetic resonance imaging or ultrasound guidance. Since this method allows efficient heating of bony structures, it has found not only early use in treatment of bone pain, but also in local treatment of malignant bone tumors. This review of 20 years of published studies shows that HIFU is a very efficient method for rapid pain relief, can provide local tumor control and has a very patient-friendly safety profile.
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Affiliation(s)
- Sin Yuin Yeo
- Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
- Correspondence:
| | - Grischa Bratke
- Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
| | - Holger Grüll
- Institute of Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
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Conti A, Geffroy F, Kamimura HAS, Novell A, Tournier N, Mériaux S, Larrat B. Regulation of P-glycoprotein and Breast Cancer Resistance Protein Expression Induced by Focused Ultrasound-Mediated Blood-Brain Barrier Disruption: A Pilot Study. Int J Mol Sci 2022; 23. [PMID: 36555129 DOI: 10.3390/ijms232415488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
The blood-brain barrier (BBB) controls brain homeostasis; it is formed by vascular endothelial cells that are physically connected by tight junctions (TJs). The BBB expresses efflux transporters such as P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP), which limit the passage of substrate molecules from blood circulation to the brain. Focused ultrasound (FUS) with microbubbles can create a local and reversible detachment of the TJs. However, very little is known about the effect of FUS on the expression of efflux transporters. We investigated the in vivo effects of moderate acoustic pressures on both P-gp and BCRP expression for up to two weeks after sonication. Magnetic resonance-guided FUS was applied in the striatum of 12 rats. P-gp and BCRP expression were determined by immunohistochemistry at 1, 3, 7, and 14 days postFUS. Our results indicate that FUS-induced BBB opening is capable of (i) decreasing P-gp expression up to 3 days after sonication in both the treated and in the contralateral brain regions and is capable of (ii) overexpressing BCRP up to 7 days after FUS in the sonicated regions only. Our findings may help improve FUS-aided drug delivery strategies by considering both the mechanical effect on the TJs and the regulation of P-gp and BCRP.
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Antoniou A, Evripidou N, Panayiotou S, Spanoudes K, Damianou C. Treatment of canine and feline sarcoma using MR-guided focused ultrasound system. J Ultrasound 2022; 25:895-904. [PMID: 35277843 PMCID: PMC9705640 DOI: 10.1007/s40477-022-00672-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 02/27/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE In recent years, veterinary medicine has enhanced its applications beyond traditional approaches, progressively incorporating the Focused Ultrasound (FUS) technology. This study investigated the ability of FUS to precisely ablate naturally occurring canine and feline soft tissue sarcomas (STS). METHODS Six dogs and four cats with superficial tumours were enrolled in the study. The tumours were treated with a Magnetic Resonance guided FUS (MRgFUS) robotic system featuring a single element spherically focused transducer of 2.6 MHz. The tumours were then removed by surgery and sent for hematoxylin and eosin (H&E) staining. RESULTS The MRgFUS system was capable of inflicting well-defined overlapping lesions in the tumours. The anatomical sites of the treated tumours were the neck, leg, face, back and belly. Coagulative necrosis was evidenced by histopathology assessment in 80% of cases. CONCLUSION Therefore, this technology can be a therapeutic solution for veterinary cancer and a model for advancing the knowledge on human STS.
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Affiliation(s)
- Anastasia Antoniou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, 30 Archbishop Kyprianou Street, 3036, Limassol, Cyprus
| | - Nikolas Evripidou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, 30 Archbishop Kyprianou Street, 3036, Limassol, Cyprus
| | - Stelios Panayiotou
- SGS Diagnostic Centre of Histopathology and Cytology Limited, 21 Thessalonikis, 3025, Limassol, Cyprus
| | - Kyriakos Spanoudes
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, 30 Archbishop Kyprianou Street, 3036, Limassol, Cyprus
| | - Christakis Damianou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, 30 Archbishop Kyprianou Street, 3036, Limassol, Cyprus.
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Visani E, Panzica F, Eleopra R, Rossi Sebastiano D, Lanteri P, Devigili G, Dotta S, Rinaldo S, Franceschetti S. MRI-guided focused-ultrasound thalamotomy in essential tremor: Immediate and delayed changes in cortico-muscular coherence and cortico-cortical out-strength. Clin Neurophysiol 2022; 144:67-71. [PMID: 36283222 DOI: 10.1016/j.clinph.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 09/30/2022] [Accepted: 10/05/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Drug-resistant essential tremor (ET) can be treated by Magnetic-Resonance-guided Focused-Ultrasound (MRgFUS) targeted to thalamic ventralis-intermediate nucleus (ViM). We are presenting the results obtained in ET patients by evaluating the cortico-muscular coherence (CMC) and the out-strength among cortical areas. METHODS We recorded MEG-EMG signals in 16 patients with predominant tremor on the right upper limb. The examination was performed the day before MRgFUS (T0) treatment, 24 hours (T1), and 3-months (T2) after lesioning the left ViM. Normalized CMC (nCMC) and cortico-cortical out-strength among cortical areas were assessed during isometric extension of the right hand. RESULTS According to the Essential Tremor Rating Assessment Scale, 13 of 16 patients were considered responders. At T1, in the beta-band, nCMC increased in the left hemisphere, namely in the areas directly involved in motor functions. At T2, the nCMC in non-motor areas decreased and the out-strength from other examined cortical areas toward the left motor-area decreased. CONCLUSIONS In patients positively responding to MRgFUS, the CMC increased in the motor-area of the treated hemisphere immediately after the treatment, while the reorganization of CMC and cortico-cortical out-strength toward the cortical motor area occurred with a delay. SIGNIFICANCE The effective treatment with MRgFUS corresponds with a readjustment of the CMC and of the communication between cortical areas.
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Affiliation(s)
- Elisa Visani
- Unit of Biomedical Engineering, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Ferruccio Panzica
- Clinical Engineering, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Roberto Eleopra
- Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Davide Rossi Sebastiano
- Department of Neurophysiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Paola Lanteri
- Department of Neurophysiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Grazia Devigili
- Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sara Dotta
- Department of Neurophysiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Sara Rinaldo
- Movement Disorders Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Silvana Franceschetti
- Department of Neurophysiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.
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Allen SP, Fergusson A, Edsall C, Chen S, Moore D, Vlaisavljevich E, Davis RM, Meyer CH. Iron-based coupling media for MRI-guided ultrasound surgery. Med Phys 2022; 49:7373-7383. [PMID: 36156266 PMCID: PMC9946126 DOI: 10.1002/mp.15979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/17/2022] [Accepted: 08/31/2022] [Indexed: 12/27/2022] Open
Abstract
PURPOSE In this study, we examine the effects of a recently developed, iron-based coupling medium (IBCM) on guidance magnetic resonance (MR) scans during transcranial, magnetic-resonance-guided, focused ultrasound surgery (tMRgFUS) procedures. More specifically, this study tests the hypotheses that the use of the IBCM will (a) not adversely affect image quality, (b) remove aliasing from small field-of-view scans, and (c) decouple image quality from the motion state of the coupling fluid. METHODS An IBCM, whose chemical synthesis and characterization are reported elsewhere, was used as a coupling medium during tMRgFUS procedures on gel phantoms. Guidance magnetization-prepared rapid-gradient-echo (MP-RAGE), TSE, and GRE scans were acquired with fields of view of 28 and 18 cm. Experiments were repeated with the IBCM in several distinct flow states. GRE scans were used to estimate temperature time courses as a gel target was insonated. IBCM performance was measured by computing (i) the root mean square difference (RMSD) of TSE and GRE pixel values acquired using water and the IBCM, relative to the use of water; (ii) through-time temperature uncertainty for GRE scans; and (iii) Bland-Altman analysis of the temperature time courses. Finally, guidance TSE and GRE scans of a human volunteer were acquired during a separate sham tMRgFUS procedure. As a control, all experiments were repeated using a water coupling medium. RESULTS Use of the IBCM reduced RMSD in TSE scans by a factor of 4 or more for all fields of view and nonstationary motion states, but did not reduce RMSD estimates in MP-RAGE scans. With the coupling media in a stationary state, the IBCM altered estimates of temperature uncertainty relative to the use of water by less than 0.2°C. However, with a high flow state, the IBCM reduced temperature uncertainties by the statistically significant amounts (at the 0.01 level) of 0.5°C (28 cm field of view) and 5°C (18 cm field of view). Bland-Altman analyses found a 0.1°C ± 0.5°C difference between temperature estimates acquired using water and the IBCM as coupling media. Finally, scans of a human volunteer using the IBCM indicate more conspicuous grey/white matter contrast, a reduction in aliasing, and a less than 0.2°C change in temperature uncertainty. CONCLUSIONS The use of an IBCM during tMRgFUS procedures does not adversely affect image quality for TSE and GRE scans, can decouple image quality from the motion state of the coupling fluid, and can remove aliasing from scans where the field of view is set to be much smaller than the spatial extent of the coupling fluid.
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Affiliation(s)
- Steven P Allen
- Department of Electrical and Computer Engineering, Brigham Young University, Provo, Utah, USA
| | - Austin Fergusson
- Graduate Program in Translational Biology, Medicine and Health Virginia Tech, Blacksburg, Virginia, USA
| | - Connor Edsall
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, Virginia, USA
| | - Sheng Chen
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - David Moore
- The Focused Ultrasound Foundation, Charlottesville, Virginia, USA
| | - Eli Vlaisavljevich
- Graduate Program in Translational Biology, Medicine and Health Virginia Tech, Blacksburg, Virginia, USA
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, Virginia, USA
| | - Richey M Davis
- Department of Chemical Engineering, Virginia Tech, Blacksburg, Virginia, USA
| | - Craig H Meyer
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, Virginia, USA
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Golfrè Andreasi N, Cilia R, Romito LM, Bonvegna S, Straccia G, Elia AE, Novelli A, Messina G, Tringali G, Levi V, Devigili G, Rinaldo S, Gasparini V, Grisoli M, Stanziano M, Ghielmetti F, Prioni S, Bocchi E, Amami P, Piacentini SHMJ, Ciceri EFM, Bruzzone MG, Eleopra R. Magnetic Resonance-Guided Focused Ultrasound Thalamotomy May Spare Dopaminergic Therapy in Early-Stage Tremor-Dominant Parkinson's Disease: A Pilot Study. Mov Disord 2022; 37:2289-2295. [PMID: 36036203 DOI: 10.1002/mds.29200] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 05/10/2022] [Accepted: 06/06/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Magnetic resonance-guided focused ultrasound (MRgFUS) thalamotomy is a safe and effective procedure for drug-resistant tremor in Parkinson's disease (PD). OBJECTIVE The aim of this study was to demonstrate that MRgFUS ventralis intermedius thalamotomy in early-stage tremor-dominant PD may prevent an increase in dopaminergic medication 6 months after treatment compared with matched PD control subjects on standard medical therapy. METHODS We prospectively enrolled patients with early-stage PD who underwent MRgFUS ventralis intermedius thalamotomy (PD-FUS) and patients treated with oral dopaminergic therapy (PD-ODT) with a 1:2 ratio. We collected demographic and clinical data at baseline and 6 and 12 months after thalamotomy. RESULTS We included 10 patients in the PD-FUS group and 20 patients in the PD-ODT group. We found a significant increase in total levodopa equivalent daily dose and levodopa plus monoamine oxidase B inhibitors dose in the PD-ODT group 6 months after thalamotomy. CONCLUSIONS In early-stage tremor-dominant PD, MRgFUS thalamotomy may be useful to reduce tremor and avoid the need to increase dopaminergic medications. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Nico Golfrè Andreasi
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Roberto Cilia
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Luigi Michele Romito
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Salvatore Bonvegna
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Giulia Straccia
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Antonio Emanuele Elia
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Alessio Novelli
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Giuseppe Messina
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neurosurgery Department, Functional Neurosurgery Unit, Milan, Italy
| | - Giovanni Tringali
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neurosurgery Department, Functional Neurosurgery Unit, Milan, Italy
| | - Vincenzo Levi
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neurosurgery Department, Functional Neurosurgery Unit, Milan, Italy
| | - Grazia Devigili
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Sara Rinaldo
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Valentina Gasparini
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
| | - Marina Grisoli
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neuroradiology Unit, Milan, Italy
| | - Mario Stanziano
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neuroradiology Unit, Milan, Italy.,Neuroscience Department "Rita Levi Montalcini", University of Turin, Turin, Italy
| | - Francesco Ghielmetti
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Health Department, Milan, Italy
| | - Sara Prioni
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Clinical Neuropsychology Unit, Milan, Italy
| | - Elisa Bocchi
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Clinical Neuropsychology Unit, Milan, Italy
| | - Paolo Amami
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Clinical Neuropsychology Unit, Milan, Italy
| | | | - Elisa Francesca Maria Ciceri
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Diagnostic Radiology and Interventional Neuroradiology, Milan, Italy
| | - Maria Grazia Bruzzone
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Neuroradiology Unit, Milan, Italy
| | - Roberto Eleopra
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
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Antoniou A, Georgiou L, Evripidou N, Ioannides C, Damianou C. Challenges regarding MR compatibility of an MRgFUS robotic system. J Magn Reson 2022; 344:107317. [PMID: 36279604 DOI: 10.1016/j.jmr.2022.107317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Numerous challenges are faced when employing Magnetic Resonance guided Focused Ultrasound (MRgFUS) hardware in the Magnetic Resonance Imaging (MRI) setting. The current study aimed to provide insights on this topic through a series of experiments performed in the framework of evaluating the MRI compatibility of an MRgFUS robotic device. All experiments were performed in a 1.5 T MRI scanner. The main metric for MRI compatibility assessment was the signal to noise ratio (SNR). Measurements were carried out in a tissue mimicking phantom and freshly excised pork tissue under various activation states of the system. In the effort to minimize magnetic interference and image distortion, various set-up parameters were examined. Significant SNR degradation and image distortion occurred when the FUS transducer was activated mainly owing to FUS-induced target and coil vibrations and was getting worse as the output power was increased. Proper design and stable positioning of the imaged phantom play a critical role in reducing these vibrations. Moreover, isolation of the phantom from the imaging coil was proven essential for avoiding FUS-induced vibrations from being transferred to the coil during sonication and resulted in a more than 3-fold increase in SNR. The use of a multi-channel coil increased the SNR by up to 50 % compared to a single-channel coil. Placement of the electronics outside the coil detection area increased the SNR by about 65 %. A similar SNR improvement was observed when the encoders' counting pulses were deactivated. Overall, this study raises awareness about major challenges regarding operation of an MRgFUS system in the MRI environment and proposes simple measures that could mitigate the impact of noise sources so that the monitoring value of MR imaging in FUS applications is not compromised.
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Affiliation(s)
- Anastasia Antoniou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus.
| | - Leonidas Georgiou
- German Oncology Center, Department of Interventional Radiology, Limassol, Cyprus.
| | - Nikolas Evripidou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus.
| | - Cleanthis Ioannides
- German Oncology Center, Department of Interventional Radiology, Limassol, Cyprus.
| | - Christakis Damianou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus.
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Li N, Gaur P, Quah K, Pauly KB. Improving in situ acoustic intensity estimates using MR acoustic radiation force imaging in combination with multifrequency MR elastography. Magn Reson Med 2022; 88:1673-1689. [PMID: 35762849 PMCID: PMC9439407 DOI: 10.1002/mrm.29309] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/28/2022] [Accepted: 04/30/2022] [Indexed: 11/08/2022]
Abstract
PURPOSE Magnetic resonance acoustic radiation force imaging (MR-ARFI) enables focal spot localization during nonablative transcranial ultrasound therapies. As the acoustic radiation force is proportional to the applied acoustic intensity, measured MR-ARFI displacements could potentially be used to estimate the acoustic intensity at the target. However, variable brain stiffness is an obstacle. The goal of this study was to develop and assess a method to accurately estimate the acoustic intensity at the focus using MR-ARFI displacements in combination with viscoelastic properties obtained with multifrequency MR elastography (MRE). METHODS Phantoms with a range of viscoelastic properties were fabricated, and MR-ARFI displacements were acquired within each phantom using multiple acoustic intensities. Voigt model parameters were estimated for each phantom based on storage and loss moduli measured using multifrequency MRE, and these were used to predict the relationship between acoustic intensity and measured displacement. RESULTS Using assumed viscoelastic properties, MR-ARFI displacements alone could not accurately estimate acoustic intensity across phantoms. For example, acoustic intensities were underestimated in phantoms stiffer than the assumed stiffness and overestimated in phantoms softer than the assumed stiffness. This error was greatly reduced using individualized viscoelasticity measurements obtained from MRE. CONCLUSION We demonstrated that viscoelasticity information from MRE could be used in combination with MR-ARFI displacements to obtain more accurate estimates of acoustic intensity. Additionally, Voigt model viscosity parameters were found to be predictive of the relaxation rate of each phantom's time-varying displacement response, which could be used to optimize patient-specific MR-ARFI pulse sequences.
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Affiliation(s)
- Ningrui Li
- Department of Electrical Engineering, Stanford University, Stanford, California, USA
| | - Pooja Gaur
- Department of Radiology, Stanford University, Stanford, California, USA
| | - Kristin Quah
- Department of Electrical Engineering, Stanford University, Stanford, California, USA
| | - Kim Butts Pauly
- Department of Radiology, Stanford University, Stanford, California, USA
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Yin C, Zong R, Song G, Zhou J, Pan L, Li X. Comparison of Motor Scores between OFF and ON States in Tremor-Dominant Parkinson's Disease after MRgFUS Treatment. J Clin Med 2022; 11:jcm11154502. [PMID: 35956119 PMCID: PMC9369361 DOI: 10.3390/jcm11154502] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 12/10/2022] Open
Abstract
Objective: To compare the motor function improvements in ON and OFF states in tremor-dominant Parkinson’s disease (TDPD) patients within one year of follow-up after ablation of the unilateral ventral intermediate nucleus of the thalamus (Vim) by magnetic resonance imaging-guided focused ultrasound surgery (MRgFUS). Methods: A total of nine consecutive patients confirmed with TDPD who underwent unilateral Vim ablation by MRgFUS between April 2019 and September 2019 were included. The Movement Disorder Society Unified Parkinson’s Disease Rating Scale part III (MDS-UPDRSIII) and Clinical Rating Scale for Tremor (CRST) were performed in the ON and OFF stages to distinguish the surgical effects from drug therapy effects. The adverse events and adjustment of drug doses were also recorded. Results: The preoperative MDS-UPDRSIII score in OFF and ON states was 55.0 (48.0, 65.5) and 26.0 (17.0, 27.0), while the CRST score was 46.0 (39.5, 53.5) and 20.0 (13.0, 23.5), respectively; the Levodopa equivalent dose was 600 (456, 600) mg/d. At 1 year after operation, the total MDS-UPDRSIII score and CRST score were 40.0 (30.0, 60.5) and 16.0 (10.0, 29.5) in the OFF state, and 21.0 (17.5, 27.0) and 2.0 (1.5, 7.0) in the ON state, respectively. Compared with the preoperative levels, follow-up at the two-time points (three months and one year after operation) showed the total MDS-UPDRSIII score, as well as MDS-UPDRSIII tremor, bradykinesia, and rigidity scores of contralateral limbs all significantly improved in OFF state. However, in the ON state, only the total MDS-UPDRSIII score and tremor score of contralateral limbs significantly improved. The total CRST score and the CRST (A + B) score of contralateral limbs significantly improved at three months and one year after the operation compared with before the operation in both ON and OFF states. The Levodopa equivalent dose at one and three months were not significantly different from the preoperative dose (p > 0.05). No serious adverse responses were observed. Conclusion: Treating TDPD with unilateral Vim ablation by MRgFUS could improve the symptoms of limb tremor and the other core symptoms, such as bradykinesia and rigidity, as well as some non-motor symptoms and the symptoms of ipsilateral limbs.
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Affiliation(s)
- Chunyu Yin
- Department of Cadres’ Outpatient, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China;
| | - Rui Zong
- Department of Neurosurgery, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China; (R.Z.); (J.Z.)
| | - Ge Song
- Department of Health Care, 305 Hospital of Chinese PLA, Beijing 100017, China;
| | - Jiayou Zhou
- Department of Neurosurgery, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China; (R.Z.); (J.Z.)
| | - Longsheng Pan
- Department of Neurosurgery, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China; (R.Z.); (J.Z.)
- Correspondence: (L.P.); (X.L.)
| | - Xuemei Li
- Department of Cadres’ Outpatient, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China;
- Correspondence: (L.P.); (X.L.)
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Zhang X, Lu H, Tang N, Chen A, Wei Z, Cao R, Zhu Y, Lin L, Li Q, Wang Z, Tian L. Low-Power Magnetic Resonance-Guided Focused Ultrasound Tumor Ablation upon Controlled Accumulation of Magnetic Nanoparticles by Cascade-Activated DNA Cross-Linkers. ACS Appl Mater Interfaces 2022; 14:31677-31688. [PMID: 35786850 DOI: 10.1021/acsami.2c07235] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Magnetic resonance-guided focused ultrasound (MRgFUS) is a promising non-invasive surgical technique with spatial specificity and minimal off-target effects. Despite the expanding clinical applications, the major obstacles associated with MRgFUS still lie in low magnetic resonance imaging (MRI) sensitivity and safety issues. High ultrasound power is required to resist the energy attenuation during the delivery to the tumor site and may cause damage to the surrounding healthy tissues. Herein, a surface modification strategy is developed to simultaneously strengthen MRI and ultrasound ablation of MRgFUS by prolonging Fe3O4 nanoparticles' blood circulation and tumor-environment-triggered accumulation and retention at the tumor site. Specifically, reactive oxygen species-labile methoxy polyethylene glycol and pH-responsive DNA cross-linkers are modified on the surface of Fe3O4 nanoparticles, which can transform nanoparticles into aggregations through the cascade responsive reactions at the tumor site. Notably, DNA is selected as the pH-responsive cross-linker because of its superior biocompatibility as well as the fast and sensitive response to the weak acidity of 6.5-6.8, corresponding to the extracellular pH of tumor tissues. Due to the significantly enhanced delivery and retention amount of Fe3O4 nanoparticles at the tumor site, the MRI sensitivity was enhanced by 1.7-fold. In addition, the ultrasound power was lowered by 35% to reach a sufficient thermal ablation effect. Overall, this investigation demonstrates a feasible resolution to promote the MRgFUS treatment by enhancing the therapeutic efficacy and reducing the side effects, which will be helpful to guide the clinical practice in the future.
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Affiliation(s)
- Xindan Zhang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Hongwei Lu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Na Tang
- Department of Radiology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China
| | - An Chen
- Department of Radiology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China
| | - Zixiang Wei
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Rong Cao
- Department of Radiology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China
| | - Yi Zhu
- Department of Radiology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China
| | - Li Lin
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Qing Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Zhongling Wang
- Department of Radiology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China
| | - Leilei Tian
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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Antoniou A, Georgiou L, Christodoulou T, Panayiotou N, Ioannides C, Zamboglou N, Damianou C. MR relaxation times of agar-based tissue-mimicking phantoms. J Appl Clin Med Phys 2022; 23:e13533. [PMID: 35415875 PMCID: PMC9121050 DOI: 10.1002/acm2.13533] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/29/2021] [Indexed: 12/31/2022] Open
Abstract
Agar gels were previously proven capable of accurately replicating the acoustical and thermal properties of real tissue and widely used for the construction of tissue-mimicking phantoms (TMPs) for focused ultrasound (FUS) applications. Given the current popularity of magnetic resonance-guided FUS (MRgFUS), we have investigated the MR relaxation times T1 and T2 of different mixtures of agar-based phantoms. Nine TMPs were constructed containing agar as the gelling agent and various concentrations of silicon dioxide and evaporated milk. An agar-based phantom doped with wood powder was also evaluated. A series of MR images were acquired in a 1.5 T scanner for T1 and T2 mapping. T2 was predominantly affected by varying agar concentrations. A trend toward decreasing T1 with an increasing concentration of evaporated milk was observed. The addition of silicon dioxide decreased both relaxation times of pure agar gels. The proposed phantoms have great potential for use with the continuously emerging MRgFUS technology. The MR relaxation times of several body tissues can be mimicked by adjusting the concentration of ingredients, thus enabling more accurate and realistic MRgFUS studies.
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Affiliation(s)
- Anastasia Antoniou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
| | - Leonidas Georgiou
- Department of Interventional Radiology, German Oncology Center, Limassol, Cyprus
| | | | - Natalie Panayiotou
- Department of Interventional Radiology, German Oncology Center, Limassol, Cyprus
| | - Cleanthis Ioannides
- Department of Interventional Radiology, German Oncology Center, Limassol, Cyprus
| | - Nikolaos Zamboglou
- Department of Interventional Radiology, German Oncology Center, Limassol, Cyprus
| | - Christakis Damianou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
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Xiong Y, Lin J, Pan L, Zong R, Bian X, Duan C, Zhang D, Lou X. Pretherapeutic functional connectivity of tractography-based targeting of the ventral intermediate nucleus for predicting tremor response in patients with Parkinson's disease after thalamotomy with MRI-guided focused ultrasound. J Neurosurg 2022; 137:1-10. [PMID: 35180696 DOI: 10.3171/2022.1.jns212449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/03/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Tractography-based direct targeting of the ventral intermediate nucleus (T-VIM) is a novel method that provides patient-specific VIM coordinates. This study aimed to explore the accuracy and predictive value of using T-VIM in combination with tractography and resting-state functional connectivity techniques to perform magnetic resonance imaging-guided focused ultrasound (MRgFUS) thalamotomy as a treatment of Parkinson's disease (PD). METHODS PD patients underwent MRgFUS thalamotomy and were recruited for functional MRI scanning. A subscore of the Clinical Rating Scale for Tremor was used to evaluate tremor improvement. T-VIM and surgical VIM (S-VIM) were defined on preoperative diffusion tensor MRI and 24-hour postoperative T1-weighted imaging, respectively. The overlapping volume and center distance between S-VIM and T-VIM were measured to determine their correlations with 12-month postoperative tremor improvement. Moreover, pretherapeutic functional connectivity of T-VIM or S-VIM, based on region-of-interest connectivity and whole-brain seed-to-voxel connectivity, was measured with the resting-state functional connectivity technique to investigate their correlations with tremor improvement. RESULTS All patients had excellent tremor improvement (mean [range] tremor improvement 74.82% [50.00%-94.44%]). The authors found that both overlapping volume and center distance between T-VIM and S-VIM were significantly correlated with tremor improvement (r = 0.788 and p = 0.012 for overlapping volume; r = -0.696 and p = 0.037 for center distance). Pretherapeutic functional connectivity of T-VIM with the ipsilateral sensorimotor cortex (r = 0.876 and p = 0.002), subthalamic nucleus (r = 0.700 and p = 0.036), and visual area (r = 0.911 and p = 0.001) was significantly and positively correlated with tremor improvement. CONCLUSIONS T-VIM may improve the clinical application of MRgFUS thalamotomy as a treatment of PD. Pretherapeutic functional connectivity of T-VIM with the ipsilateral sensorimotor cortex, subthalamic nucleus, and visual area may predict PD tremor responses after MRgFUS thalamotomy.
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Affiliation(s)
- Yongqin Xiong
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
| | - Jiaji Lin
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
| | - Longsheng Pan
- 2Department of Neurosurgery, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China
| | - Rui Zong
- 2Department of Neurosurgery, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China
| | - Xiangbing Bian
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
| | - Caohui Duan
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
| | - Dekang Zhang
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
| | - Xin Lou
- 1Department of Radiology, Chinese PLA General Hospital/Chinese PLA Medical School, Beijing, China; and
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Antoniou A, Damianou C. MR relaxation properties of tissue-mimicking phantoms. Ultrasonics 2022; 119:106600. [PMID: 34627028 DOI: 10.1016/j.ultras.2021.106600] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
High quality tissue-mimicking phantoms (TMPs) have a critical role in the preclinical testing of emerging modalities for diagnosis and therapy. TMPs capable of accurately mimicking real tissue in Magnetic Resonance guided Focused Ultrasound (MRgFUS) applications should be fabricated with precise T1 and T2 relaxation times. Given the current popularity of the MRgFUS technology, we herein performed a systematic review on the MR relaxation properties of different phantoms types. Polyacrylamide (PAA) and agar based phantoms were proven capable of accurately replicating critical thermal, acoustical, and MR relaxation properties of various body tissues. Although gelatin phantoms were also proven factional in this regard, they lack the capacity to withstand ablation temperatures, and thus, are only recommended for hyperthermia applications. Other gelling agents identified in the literature are Poly-vinyl alcohol (PVA), Polyvinyl Chloride (PVC), silicone, and TX-150/ TX-151; however, their efficacy in thermal studies is yet to be established. PAA gels are favorable in that they offer optical transparency enabling direct visualization of coagulative lesions. On the other hand, agar phantoms have lower preparation costs and were proven very promising for use with the MRgFUS technology, without the toxicity issues related to the preparation and storage of PAA materials. Remarkably, agar turned out to be the prominent modifier of the T2 relaxation time even for phantoms containing other types of gelling agents instead of agar. This review could be useful in manufacturing realistic MRgFUS phantoms while simultaneously indicating an opportunity for further research in the field with a particular focus on the MR behavior of agar-based TMPs.
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Affiliation(s)
- Anastasia Antoniou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus
| | - Christakis Damianou
- Department of Electrical Engineering, Computer Engineering, and Informatics, Cyprus University of Technology, Limassol, Cyprus.
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Cobianchi Bellisari F, Palumbo P, Masciocchi C, Zoccali C, Barile A, Arrigoni F. Needleless Ablation of Osteoid Osteoma and Osteoblastoma: The Emergent Role of MRgFUS. J Clin Med 2021; 11:128. [PMID: 35011867 PMCID: PMC8745067 DOI: 10.3390/jcm11010128] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/21/2021] [Accepted: 12/24/2021] [Indexed: 12/18/2022] Open
Abstract
Osteoblastoma (OB) and osteoid osteoma (OO) are benign bone-forming tumors, with nearly identical basic microscopic features. The main difference is dimension (OO has usually a nidus measuring <2 cm in diameter). In addition, OB is biologically more active than OO, with a tendency to grow in size. Historically, treatments have included surgical resection and analgesics, although invasiveness and poor tolerance have led to the current standard of care moving toward interventional radiology, where radiofrequency ablation (RFA) represents the most diffuse technique. Magnetic resonance-guided focused ultrasound surgery (MRgFUS) has recently emerged as another innovative alternative treatment, providing tumor ablation through a needleless and ionizing radiation-free modality. In addition, this technique has the ability to guarantee a very precise and controlled increase in temperature, delivering small amounts of energy that can accurately destroy only the lesion, avoiding healthy surrounding tissues. The present review focuses on MRgFUS as the less invasive, safe, effective, and durable treatment option for the management of osteoid osteoma and osteoblastoma, including a description of technical details, indications and outcomes.
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Affiliation(s)
- Flavia Cobianchi Bellisari
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.M.); (A.B.); (F.A.)
| | - Pierpaolo Palumbo
- Abruzzo Health Unit 1, Department of Diagnostic Imaging, Area of Cardiovascular and Interventional Imaging, 67100 L’Aquila, Italy;
| | - Carlo Masciocchi
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.M.); (A.B.); (F.A.)
| | - Carmine Zoccali
- Department of Oncological Orthopaedics, IFO-Regina Elena National Cancer Institute, 00144 Rome, Italy;
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedic Science, University of Rome, 00185 Rome, Italy
| | - Antonio Barile
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.M.); (A.B.); (F.A.)
| | - Francesco Arrigoni
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.M.); (A.B.); (F.A.)
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Baal JD, Chen WC, Baal U, Wagle S, Baal JH, Link TM, Bucknor MD. Efficacy and safety of magnetic resonance-guided focused ultrasound for the treatment of painful bone metastases: a systematic review and meta-analysis. Skeletal Radiol 2021; 50:2459-2469. [PMID: 34018007 PMCID: PMC8536557 DOI: 10.1007/s00256-021-03822-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/21/2021] [Accepted: 05/16/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To report the safety and efficacy of magnetic resonance-guided focused ultrasound (MRgFUS) in the treatment of painful bone metastases through a systematic review and meta-analysis of pain scores before and after MRgFUS treatment and post-treatment adverse events. MATERIALS AND METHODS A comprehensive literature search of PubMed and Embase databases was performed for studies evaluating the efficacy and/or safety of MRgFUS. The mean difference of pain scores (10-point visual analogue scale or numerical rating scale) between baseline and 1-month/3-month pain scores was collected and analyzed in a pooled meta-analysis. Post-treatment adverse events based on the Common Terminology Criteria for Adverse Events (CTCAE) grading were recorded and the pooled prevalence was calculated. RESULTS A total of 33 studies published between 2007 and 2019 were collected, resulting in a total sample size of 1082 patients. The majority of the studies were prospective with a reported follow-up period of 3 months. The pooled proportion of patients that achieved pain relief from MRgFUS (complete response or partial response [≥ 2-point improvement of pain score]) was 79% (95% CI 73-83%). The pooled 1-month and 3-month mean difference in pain score were - 3.8 (95% CI - 4.3; - 3.3) and - 4.4 (95% CI - 5.0; - 3.7), respectively. The overall rate of high-grade (CTCAE grade 3 or higher) and low-grade (CTCAE grade 2 or lower) MRgFUS-related adverse events were 0.9% and 5.9%, respectively. CONCLUSION MRgFUS is an effective procedure that is able to provide significant pain palliation for patients with symptomatic bone metastases with a favorable safety profile.
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Affiliation(s)
- Joe D. Baal
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Lobby 6, Suite 350, San Francisco, CA 94107 USA
| | - William C. Chen
- Department of Radiation Oncology, University of California, San Francisco, San Francisco, USA
| | - Ulysis Baal
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Lobby 6, Suite 350, San Francisco, CA 94107 USA
| | - Sagar Wagle
- Department of Radiology, Mayo Clinic, Rochester, USA
| | - Jed H. Baal
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Lobby 6, Suite 350, San Francisco, CA 94107 USA
| | - Thomas M. Link
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Lobby 6, Suite 350, San Francisco, CA 94107 USA
| | - Matthew D. Bucknor
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 185 Berry Street, Lobby 6, Suite 350, San Francisco, CA 94107 USA
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Inbar Y, Machtinger R, Barnett-Itzhaki Z, Goldblatt A, Stoler E, Rabinovici J. MRI guided focused ultrasound ( MRgFUS) treatment for uterine fibroids among women with and without abdominal scars. Int J Hyperthermia 2021; 38:1672-1676. [PMID: 34843654 DOI: 10.1080/02656736.2021.2007302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
INTRODUCTION MRI guided focused ultrasound (MRgFUS) is a noninvasive technique for treating uterine fibroids. The presence of abdominal scars can limit the number of women eligible for the procedure, due to absorbance of beam energy. The goals of this study were to assess the number of women that fit the procedure and to compare outcomes among women with or without abdominal scars. MATERIAL AND METHODS A prospective cohort study of all women that were interested in MRgFUS in a single University-Affiliated Hospital between November 2012 and December 2019. Rates of women that were referred to further screening, fulfilled selection criteria and underwent the procedure were compared between patients with or without abdominal scars. We evaluated the treatment parameters of the two groups and used linear regression model predict non-perfused volume (NPV) at the end of the process. RESULTS Out of 701 patients, 21.8% were suitable for MRgFUS. Women with scars had significant lower NPV compared with women without scars (60% versus 82.4%, p = 0.021). No serious adverse events were reported in both groups. Linear regression models showed that fibroids' volume, stopping the treatment due to severe pain and the presence of abdominal scars had a statistically significantly negative effect on NPV (betas: -11.51, -6.96, and -6.29, p-values: <0.001, 0.003, and 0.007 respectively), while number of sonication had a statistically significantly positive effect on NPV (beta = 5.98, p = 0.011). CONCLUSION Regardless of strict inclusion criteria, MRgFUS treatment is less efficient among women with abdominal scars, although still feasible for those who are interested in noninvasive option.
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Affiliation(s)
- Yael Inbar
- Departments of Radiology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Advanced Technology Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Ronit Machtinger
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Advanced Technology Center, Sheba Medical Center, Tel-Hashomer, Israel.,Departments of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Zohar Barnett-Itzhaki
- Public Health Services, Ministry of Health, Jerusalem, Israel.,School of Engineering, Research Center for Health Informatics, Ruppin Academic Center, Emek Hefer, Israel
| | - Avishai Goldblatt
- Departments of Radiology, Sheba Medical Center, Tel-Hashomer, Israel.,Advanced Technology Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Eti Stoler
- Advanced Technology Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Jaron Rabinovici
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Advanced Technology Center, Sheba Medical Center, Tel-Hashomer, Israel.,Departments of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel
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48
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Kim K, Zubair M, Adams M, Diederich CJ, Ozhinsky E. Sonication strategies toward volumetric ultrasound hyperthermia treatment using the ExAblate body MRgFUS system. Int J Hyperthermia 2021; 38:1590-1600. [PMID: 34749579 DOI: 10.1080/02656736.2021.1998658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
PURPOSE The ExAblate body MRgFUS system requires advanced beamforming strategies for volumetric hyperthermia. This study aims to develop and evaluate electronic beam steering, multi-focal patterns, and sector vortex beamforming approaches in conjunction with partial array activation using an acoustic and biothermal simulation framework along with phantom experiments. METHODS The simulation framework was developed to calculate the 3D acoustic intensity and temperature distribution resulting from various beamforming and scanning strategies. A treatment cell electronically sweeping a single focus was implemented and evaluated in phantom experiments. The acoustic and thermal focal size of vortex beam propagation was quantified according to the vortex modes, number of active array elements, and focal depth. RESULTS Turning off a percentage of the outer array to increase the f-number increased the focal size with a decrease in focal gain. 60% active elements allowed generating a sonication cell with an off-axis of 10 mm. The vortex mode number 4 with 60% active elements resulted in a larger heating volume than using the full array. Volumetric hyperthermia in the phantom was evaluated with the vortex mode 4 and respectively performed with 100% and 80% active elements. MR thermometry demonstrated that the volumes were found to be 18.8 and 29.7 cm3, respectively, with 80% array activation producing 1.58 times larger volume than the full array. CONCLUSIONS This study demonstrated that both electronic beam steering and sector vortex beamforming approaches in conjunction with partial array activation could generate large volume heating for HT delivery using the ExAblate body array.
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Affiliation(s)
- Kisoo Kim
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Muhammad Zubair
- Department of Radiation Oncology, University of California, San Francisco, CA, USA
| | - Matthew Adams
- Department of Radiation Oncology, University of California, San Francisco, CA, USA
| | - Chris J Diederich
- Department of Radiation Oncology, University of California, San Francisco, CA, USA
| | - Eugene Ozhinsky
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
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Davidson B, Hamani C, Huang Y, Jones RM, Meng Y, Giacobbe P, Lipsman N. Magnetic Resonance-Guided Focused Ultrasound Capsulotomy for Treatment-Resistant Psychiatric Disorders. Oper Neurosurg (Hagerstown) 2021; 19:741-749. [PMID: 32735671 DOI: 10.1093/ons/opaa240] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Psychiatric surgery is an important domain of functional neurosurgery and involves deep brain stimulation (DBS) or lesional procedures performed for treatment-resistant psychiatric illness. It has recently become possible to use magnetic-guided focused ultrasound (MRgFUS) to perform bilateral capsulotomy, a lesional technique commonly carried out with surgical radiofrequency ablation or stereotactic radiosurgery. MRgFUS offers several advantages, including improved safety and real-time imaging of the lesions. OBJECTIVE To describe the clinical and technical aspects of performing bilateral MRgFUS capsulotomy in patients with severe refractory depression and obsessive-compulsive disorder. METHODS We describe the clinical and technical considerations of performing MRgFUS capsulotomy. Topics discussed include patient selection, headframe application, targeting, sonication strategies, and follow-up procedures. RESULTS MRgFUS capsulotomy was performed in 16 patients without serious clinical or radiographic adverse events. CONCLUSION MRgFUS allows for a safe, less invasive technique for performing a well-studied psychiatric surgery procedure-the anterior capsulotomy.
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Affiliation(s)
- Benjamin Davidson
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada.,Harquail Centre for Neuromodulation, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Canada.,Sunnybrook Research Institute, Toronto Canada
| | - Clement Hamani
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada.,Harquail Centre for Neuromodulation, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Canada.,Sunnybrook Research Institute, Toronto Canada
| | - Yuexi Huang
- Sunnybrook Research Institute, Toronto Canada.,Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada
| | - Ryan M Jones
- Sunnybrook Research Institute, Toronto Canada.,Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada
| | - Ying Meng
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada.,Harquail Centre for Neuromodulation, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Canada.,Sunnybrook Research Institute, Toronto Canada
| | - Peter Giacobbe
- Harquail Centre for Neuromodulation, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Canada.,Sunnybrook Research Institute, Toronto Canada.,Department of Psychiatry, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Nir Lipsman
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada.,Harquail Centre for Neuromodulation, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Canada.,Sunnybrook Research Institute, Toronto Canada
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Hyvärinen M, Huang Y, David E, Hynynen K. Comparison of computer simulations and clinical treatment results of magnetic resonance guided focused ultrasound surgery ( MRgFUS) of uterine fibroids. Med Phys 2021; 49:2101-2119. [PMID: 34601729 PMCID: PMC9314069 DOI: 10.1002/mp.15263] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 08/31/2021] [Accepted: 08/31/2021] [Indexed: 11/15/2022] Open
Abstract
Purpose Magnetic resonance‐guided focused ultrasound surgery (MRgFUS) can be used to noninvasively treat symptomatic uterine fibroids by heating with focused ultrasound sonications while monitoring the temperature with magnetic resonance (MR) thermometry. While prior studies have compared focused ultrasound simulations to clinical results, studies involving uterine fibroids remain scarce. In our study, we perform such a comparison to assess the suitability of simulations for treatment planning. Methods Sonications (N = 67) were simulated retrospectively using acoustic and thermal models based on the Rayleigh integral and Pennes bioheat equation followed by MR‐thermometry simulation in seven patients who underwent MRgFUS treatment for uterine fibroids. The spatial accuracy of simulated focus location was assessed by evaluating displacements of the centers of mass of the thermal dose distributions between simulated and treatment MR thermometry slices. Temperature–time curves and sizes of 240 equivalent minutes at 43°C (240EM43) volumes between treatment and simulation were compared. Results The simulated focus location showed errors of 2.7 ± 4.1, −0.7 ± 2.0, and 1.3 ± 1.2 mm (mean ± SD) in the anterior–posterior, foot–head, and right–left directions for a fibroid absorption coefficient of 4.9 Np m–1 MHz–1 and perfusion parameter of 1.89 kg m–3 s–1. Linear regression of 240EM43 volumes of 67 sonications of patient treatments and simulations utilizing these parameters yielded a slope of 1.04 and a correlation coefficient of 0.54. The temperature rise ratio of simulation to treatment near the end of sonication was 0.47 ± 0.22, 1.28 ± 0.60, and 1.49 ± 0.71 for 66 sonications simulated utilizing fibroid absorption coefficient of 1.2, 4.9, and 8.6 Np m–1 MHz–1, respectively, and the aforementioned perfusion value. The impact of perfusion on peak temperature rise is minimal between 1.89 and 10 kg m–3 s–1, but became more substantial when utilizing a value of 100 kg m–3 s–1. Conclusions The results of this study suggest that perfusion, while in some cases having a substantial impact on thermal dose volumes, has less impact than ultrasound absorption for predicting peak temperature elevation at least when using perfusion parameter values up to 10 kg m–3 s–1 for this particular array geometry, frequencies, and tissue target which is good for clinicians to be aware of. The results suggest that simulations show promise in treatment planning, particularly in terms of spatial accuracy. However, in order to use simulations to predict temperature rise due to a sonication, knowledge of the patient‐specific tissue parameters, in particular the absorption coefficient is important. Currently, spatially varying patient‐specific tissue parameter values are not available during treatment, so simulations can only be used for planning purposes to estimate sonication performance on average.
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Affiliation(s)
- Mikko Hyvärinen
- Sunnybrook Research Institute, Toronto, Ontario, M4N 3M5, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
| | - Yuexi Huang
- Sunnybrook Research Institute, Toronto, Ontario, M4N 3M5, Canada
| | - Elizabeth David
- Sunnybrook Research Institute, Toronto, Ontario, M4N 3M5, Canada
| | - Kullervo Hynynen
- Sunnybrook Research Institute, Toronto, Ontario, M4N 3M5, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
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