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Forbrig R, Ozpeynirci Y, Fischer TD, Trumm CG, Liebig T, Stahl R. Radiation Dose and Fluoroscopy Time of Extracranial Carotid Artery Stenting : Elective vs. Emergency Treatment Including Combined Mechanical Thrombectomy in Tandem Occlusion. Clin Neuroradiol 2023; 33:843-853. [PMID: 37261451 PMCID: PMC10449680 DOI: 10.1007/s00062-023-01288-w] [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: 10/17/2022] [Accepted: 03/24/2023] [Indexed: 06/02/2023]
Abstract
PURPOSE Fluoroscopically guided endovascular carotid artery stenting (CAS) of extracranial carotid stenosis (ECS) is a reasonable alternative to carotid endarterectomy in selected patients. Diagnostic reference levels (DRL) for this common neurointervention have not yet been defined and respective literature data are sparse. We provide detailed dosimetrics for useful expansion of the DRL catalogue. METHODS A retrospective single-center study of patients undergoing CAS between 2013 and 2021. We analyzed dose area product (DAP) and fluoroscopy time considering the following parameters: indications for CAS, semielective/elective versus emergency including additional mechanical thrombectomy (MT) in extracranial/intracranial tandem occlusion, etiology of ECS (atherosclerotic vs. radiation-induced), periprocedural features, e.g., number of applied stents, percutaneous transluminal angioplasty (PTA) and MT maneuvers, and dose protocol. Local DRL was defined as 75% percentile of the DAP distribution. RESULTS A total of 102 patients were included (semielective/elective CAS n = 75, emergency CAS n = 8, CAS + MT n = 19). Total median DAP was 78.2 Gy cm2 (DRL 117 Gy cm2). Lowest and highest median dosimetry values were documented for semielective/elective CAS and CAS + MT (DAP 49.1 vs. 146.8 Gy cm2, fluoroscopy time 27.1 vs. 43.8 min; p < 0.005), respectively. Dosimetrics were significantly lower in patients undergoing 0-1 PTA maneuvers compared to ≥ 2 maneuvers (p < 0.05). Etiology of ECS, number of stents and MT maneuvers had no significant impact on dosimetry values (p > 0.05). A low-dose protocol yielded a 33% reduction of DAP. CONCLUSION This CAS study suggests novel local DRLs for both elective and emergency cases with or without intracranial MT. A dedicated low-dose protocol was suitable for substantial reduction of radiation dose.
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Thomas David Fischer
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Christoph G. Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Robert Stahl
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
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Liebig T, Gal G, O Kelly C, Wodarg F, Killer-Oberpfalzer M, Ozpeynirci Y, Bester M, Tsogkas I, Psychogios MN, Jansen O, Fiehler J. Neqstent coil-assisted flow diverter (NQS) for the treatment of bifurcation aneurysms: the coil-assisted flow diversion safety and performance study (CAFI). J Neurointerv Surg 2023:jnis-2022-020056. [PMID: 37419693 DOI: 10.1136/jnis-2022-020056] [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: 01/15/2023] [Accepted: 06/22/2023] [Indexed: 07/09/2023]
Abstract
BackgroundThe Neqstent coil-assisted flow diverter (NQS) is a neck bridging device to facilitate coil occlusion of intracranial aneurysms. CAFI is a prospective, single-arm, multicenter study on the safety and performance of the NQS adjunctive therapy device together with platinum coils for treatment of unruptured intracranial aneurysms. METHODS Thirty-eight patients were enrolled. Primary endpoints were occlusion at 6 months for efficacy, and any major stroke or non-accidental death up to 30 days or major disabling stroke within 6 months for safety. Secondary endpoints were re-treatment rate, procedure time, and procedure/device-related adverse events. Procedural and follow-up imaging was reviewed by an independent core laboratory. Adverse events were reviewed and adjudicated by a clinical events committee. RESULTS The NQS was successfully implanted in 36/38 aneurysms, 2/38 in the intention-to-treat group did not receive a NQS and were excluded from follow-up after 30 days. In the per protocol group (PP), 33/36 patients were available for angiographic follow-up. Device related adverse events were recorded in 4/38 (10.5%) patients, one hemorrhagic and three thromboembolic. In the PP group, immediate post-treatment adequate occlusion (RR1 and RR2) was seen in 9/36 (25%) and progressed to 28/36 (77.8%) at 6 months. Complete occlusion (RR1) was achieved in 29/36 (80.6%) at the last available angiogram (3/36 were post procedure). The mean procedure time was 129 min (50-300 min, median 120 min). CONCLUSION The NQS in conjunction with coils appears to be effective in the treatment of intracranial wide-neck bifurcation aneurysms, but its safety remains to be proved in larger series. TRIAL REGISTRATION NUMBER NCT04187573.
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Affiliation(s)
- Thomas Liebig
- Department of Neuroradiology, Ludwig Maximilian University, Muenchen, Germany
| | - Gyula Gal
- Department of Radiology, Odense Universitetshospital, Odense, Denmark
| | - Cian O Kelly
- Department of Surgery (Neurosurgery), University of Alberta, Edmonton, Alberta, Canada
| | - Fritz Wodarg
- Department of Radiology and Neuroradiology, Universitaetsklinikum Schleswig-Holstein Campus Kiel, Kiel, Germany
| | | | - Yigit Ozpeynirci
- Department of Neuroradiology, Ludwig Maximilian University, Muenchen, Germany
| | - Maxim Bester
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ioannis Tsogkas
- Department of Neuroradiology, University Hospital Basel, Basel, Switzerland
| | | | - Olav Jansen
- Department of Radiology and Neuroradiology, Universitaetsklinikum Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Jens Fiehler
- Department of Neuroradiology, University Medical Center Hamburg Eppendorf, Hamburg, Germany
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Hachem E, Meliga P, Goetz A, Rico PJ, Viquerat J, Larcher A, Valette R, Sanches AF, Lannelongue V, Ghraieb H, Nemer R, Ozpeynirci Y, Liebig T. Reinforcement learning for patient-specific optimal stenting of intracranial aneurysms. Sci Rep 2023; 13:7147. [PMID: 37130900 PMCID: PMC10154322 DOI: 10.1038/s41598-023-34007-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 04/22/2023] [Indexed: 05/04/2023] Open
Abstract
Developing new capabilities to predict the risk of intracranial aneurysm rupture and to improve treatment outcomes in the follow-up of endovascular repair is of tremendous medical and societal interest, both to support decision-making and assessment of treatment options by medical doctors, and to improve the life quality and expectancy of patients. This study aims at identifying and characterizing novel flow-deviator stent devices through a high-fidelity computational framework that combines state-of-the-art numerical methods to accurately describe the mechanical exchanges between the blood flow, the aneurysm, and the flow-deviator and deep reinforcement learning algorithms to identify a new stent concepts enabling patient-specific treatment via accurate adjustment of the functional parameters in the implanted state.
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Affiliation(s)
- E Hachem
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France.
| | - P Meliga
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - A Goetz
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - P Jeken Rico
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - J Viquerat
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - A Larcher
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - R Valette
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - A F Sanches
- Department of Neuroradiology, University Hospital Munich (LMU), Munich, Germany
| | - V Lannelongue
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - H Ghraieb
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - R Nemer
- MINES Paris, PSL Research University, Centre de mise en forme des matériaux (CEMEF), CNRS UMR 7635, 06904, Sophia Antipolis Cedex, France
| | - Y Ozpeynirci
- Department of Neuroradiology, University Hospital Munich (LMU), Munich, Germany
| | - T Liebig
- Department of Neuroradiology, University Hospital Munich (LMU), Munich, Germany
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Celik E, Goertz L, Ozpeynirci Y, Schlamann M, Dorn F, Lehnen N, Siebert E, Liebig T, Kabbasch C. Comparative assessment of woven endobridge embolization and standard coil occlusion for the treatment of ruptured basilar tip aneurysms. Neuroradiology 2023; 65:765-773. [PMID: 36460785 DOI: 10.1007/s00234-022-03096-4] [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: 07/25/2022] [Accepted: 11/26/2022] [Indexed: 12/03/2022]
Abstract
PURPOSE Endovascular coil occlusion represents the standard treatment for basilar tip aneurysms. Recently, this role has been rivalled by intrasaccular flow disruptors across numerous centres. We retrospectively compared WEB embolization and coiling for the treatment of ruptured basilar tip aneurysms. METHODS Patients treated with WEB or coiling at four neurovascular centres were reviewed. Procedure-related complications, clinical outcome, and angiographic results were retrospectively compared. RESULTS The study included 23 patients treated with the WEB (aneurysm size: 6.6 ± 1.9 mm) and 56 by coiling (aneurysm size: 6.7 ± 2.5 mm). Stent-assistance was more often necessary with coiling than with WEB embolization (32% vs. 4%, p = 0.009). A modified Rankin scale score ≤ 2 at discharge had 21 (37.5%) patients in the coiling group and 12 (52.2%) in the WEB group (p = 0.235). Immediate complete and adequate occlusion rates were 52% for the WEB and 87% for coiling. At short-term follow-up, these rates were 87% for the WEB and 72% for coiling, respectively. There was no delayed aneurysm re-bleeding during follow-up. CONCLUSION Both coiling and WEB seem to prevent rebleeding in ruptured BTA aneurysms. WEB embolization required less frequently stent-support than coiling, potentially advantageous for SAH patients to avoid anti-platelet therapy in the light of concomitant procedures like ventricular drainage.
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Affiliation(s)
- Erkan Celik
- Department of Radiology and Neuroradiology, University Hospital of Cologne, Cologne, Germany.
| | - Lukas Goertz
- Department of Radiology and Neuroradiology, University Hospital of Cologne, Cologne, Germany
| | - Yigit Ozpeynirci
- Department of Neuroradiology, Ludwig's Maximilian University Munich, Munich, Germany
| | - Marc Schlamann
- Department of Radiology and Neuroradiology, University Hospital of Cologne, Cologne, Germany
| | - Franziska Dorn
- Department of Neuroradiology, University Hospital Bonn, Bonn, Germany
| | - Nils Lehnen
- Department of Neuroradiology, University Hospital Bonn, Bonn, Germany
| | - Eberhard Siebert
- Department of Neuroradiology, University Hospital of Berlin (Charité), Berlin, Germany
| | - Thomas Liebig
- Department of Neuroradiology, Ludwig's Maximilian University Munich, Munich, Germany
| | - Christoph Kabbasch
- Department of Radiology and Neuroradiology, University Hospital of Cologne, Cologne, Germany
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Stahl R, Seidensticker M, de Figueiredo GN, Pedersen V, Crispin A, Forbrig R, Ozpeynirci Y, Liebig T, D’Anastasi M, Hackner D, Trumm CG. Low-Dose CT Fluoroscopy-Guided Drainage of Deep Pelvic Fluid Collections after Colorectal Cancer Surgery: Technical Success, Clinical Outcome and Safety in 40 Patients. Diagnostics (Basel) 2023; 13:diagnostics13040711. [PMID: 36832199 PMCID: PMC9955776 DOI: 10.3390/diagnostics13040711] [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: 01/15/2023] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
PURPOSE To assess the technical (TS) and clinical success (CS) of CT fluoroscopy-guided drainage (CTD) in patients with symptomatic deep pelvic fluid collections following colorectal surgery. METHODS A retrospective analysis (years 2005 to 2020) comprised 43 drain placements in 40 patients undergoing low-dose (10-20 mA tube current) quick-check CTD using a percutaneous transgluteal (n = 39) or transperineal (n = 1) access. TS was defined as sufficient drainage of the fluid collection by ≥50% and the absence of complications according to the Cardiovascular and Interventional Radiological Society of Europe (CIRSE). CS comprised the marked reduction of elevated laboratory inflammation parameters by ≥50% under minimally invasive combination therapy (i.v. broad-spectrum antibiotics, drainage) within 30 days after intervention and no surgical revision related to the intervention required. RESULTS TS was gained in 93.0%. CS was obtained in 83.3% for C-reactive Protein and in 78.6% for Leukocytes. In five patients (12.5%), a reoperation due to an unfavorable clinical outcome was necessary. Total dose length product (DLP) tended to be lower in the second half of the observation period (median: years 2013 to 2020: 544.0 mGy*cm vs. years 2005 to 2012: 735.5 mGy*cm) and was significantly lower for the CT fluoroscopy part (median: years 2013 to 2020: 47.0 mGy*cm vs. years 2005 to 2012: 85.0 mGy*cm). CONCLUSIONS Given a minor proportion of patients requiring surgical revision due to anastomotic leakage, the CTD of deep pelvic fluid collections is safe and provides an excellent technical and clinical outcome. The reduction of radiation exposition over time can be achieved by both the ongoing development of CT technology and the increased level of interventional radiology (IR) expertise.
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Affiliation(s)
- Robert Stahl
- Institute for Diagnostic and Interventional Neuroradiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
- Correspondence: ; Tel.: +49-89-4400-74629
| | - Max Seidensticker
- Department of Radiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Giovanna Negrão de Figueiredo
- Department of Neuroradiology, University Hospital Zurich, University of Zurich, Frauenklinikstr. 10, 8091 Zurich, Switzerland
| | - Vera Pedersen
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Alexander Crispin
- IBE—Institute for Medical Information Processing, Biometry and Epidemiology, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Robert Forbrig
- Institute for Diagnostic and Interventional Neuroradiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Yigit Ozpeynirci
- Institute for Diagnostic and Interventional Neuroradiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Thomas Liebig
- Institute for Diagnostic and Interventional Neuroradiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
| | - Melvin D’Anastasi
- Department of Radiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
- Medical Imaging Department, Mater Dei Hospital, University of Malta, MSD 2090 Msida, Malta
| | - Danilo Hackner
- Department of General and Visceral Surgery, University Hospital Erlangen, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Krankenhausstr. 12, 91054 Erlangen, Germany
| | - Christoph G. Trumm
- Institute for Diagnostic and Interventional Neuroradiology, University Hospital, Ludwig-Maximilians-University (LMU), Marchioninistr. 15, 81377 Munich, Germany
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Strohm A, Braun M, Kloth C, Sollmann N, Ozpeynirci Y, Pala A, Beer M, Schmitz BL, Rosskopf J. Effectiveness and Safety of CT-Guided Facet Joint Cyst Rupture for Radicular Pain as First Choice Therapy: A Retrospective Analysis. Pain Med 2023; 24:158-164. [PMID: 35944225 DOI: 10.1093/pm/pnac116] [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] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To evaluate effectiveness and safety of computed tomography (CT)-guided cyst rupture with intraarticular contrast-enhanced injection of steroid and local anesthetic as first choice therapy in patients with facet joint cyst-induced radicular pain. DESIGN Retrospective data set analysis. SETTING University hospital. SUBJECTS One hundred and twenty-one patients suffering from radicular pain attributable to facet joint cysts were included. METHODS The rate of patients without following surgery was assessed and defined as surrogate to measure effectiveness. Patients' characteristics, procedure-associated complications, technical aspects, and imaging findings on magnetic resonance imaging (MRI) were analyzed. A subgroup of 65 patients (54%) underwent telephone interview to assess pain relief and clinical outcome measured by Numeric Rating Scale and Oswestry Disability Index. Analyses between the groups with and without surgery were performed by Fisher exact test and two-sample unpaired t-test, respectively. RESULTS The effectiveness of CT-guided cyst rupture was found to be 66.1%. Procedure-induced pain yielded in premature abort in two cases (1.7%). The detection of epidural contrast agent was statistically significantly associated with no need for surgery (P = .010). The cyst level was associated with the status of following surgery (P = .026), that is, cysts at lower lumbar spine were easier to rupture than cysts at other locations (cervical, thoracic, or upper lumbar spine). No further significant association was found. CONCLUSIONS CT-guided cyst rupture as the first-choice therapy in patients with cyst-induced radicular pain was safe and effective. Successful cyst rupture was associated with no need for surgery. Cysts at lower lumbar spine revealed the highest success rate.
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Affiliation(s)
- Alexa Strohm
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany.,Section of Neuroradiology, University of Ulm, Bezirkskrankenhaus Guenzburg, Guenzburg, Germany
| | - Michael Braun
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany.,Section of Neuroradiology, University of Ulm, Bezirkskrankenhaus Guenzburg, Guenzburg, Germany
| | - Christopher Kloth
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany
| | - Nico Sollmann
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, Ludwig-Maximilian-University, Munich, Germany
| | - Andrej Pala
- Department of Neurosurgery, University of Ulm, Bezirkskrankenhaus Guenzburg, Guenzburg, Germany
| | - Meinrad Beer
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany
| | - Bernd L Schmitz
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany.,Section of Neuroradiology, University of Ulm, Bezirkskrankenhaus Guenzburg, Guenzburg, Germany
| | - Johannes Rosskopf
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany.,Section of Neuroradiology, University of Ulm, Bezirkskrankenhaus Guenzburg, Guenzburg, Germany
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Wodarg F, Ozpeynirci Y, Hensler J, Jansen O, Liebig T. Contour-Assisted coiling with jailed microcatheter May result in better occlusion (CoCoJaMBO) in wide-necked intracranial aneurysms: Proof of principle and immediate angiographic results. Interv Neuroradiol 2023; 29:79-87. [PMID: 35014885 PMCID: PMC9893242 DOI: 10.1177/15910199211069782] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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: 09/27/2021] [Revised: 12/07/2021] [Accepted: 12/09/2021] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Wide-necked bifurcation aneurysms, partially thrombosed, and recurrences of large and giant aneurysms are challenging to treat. We report our preliminary experience with a Contour-assisted coiling technique and discuss the periprocedural safety, feasibility, and effectiveness of the approach. METHODS We retrospectively reviewed consecutive patients who received endovascular treatment for intracranial aneurysms with an intra-aneurysmal flow disruptor (Contour) at two neurovascular centres between October 2018 and December 2020 and identified patients treated with a combination of Contour and platinum coils. Clinical and procedural data were recorded. RESULTS For this analysis, 8 patients (5 female) aged 60.1 ± 9.2 years on average were identified. Three of 8 aneurysms were associated with previous acute subarachnoid hemorrhage (SAH). The mean average dome height was 12.8 ± 7.6 mm, mean maximum dome width 10.3 ± 5.4 mm, and neck width 5.5 ± 2.5 mm. The mean dome-to-neck ratio was 1.9 ± 1.0. Immediate complete occlusion of the aneurysm was seen in 5 of 8 cases. In one SAH patient, a parent vessel was temporarily occluded but could be reopened rapidly. One device detached prematurely without any sequelae. No other procedural adverse events were recorded. CONCLUSION From this initial experience, Contour with adjunctive coiling is a safe and technically feasible method for endovascular treatment of large, wide-necked, partially thrombosed, recurrent, or ruptured bifurcation aneurysms. Further studies with larger numbers of patients and longer follow-up are needed to confirm our results.
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Affiliation(s)
- Fritz Wodarg
- Department of Radiology and Neuroradiology, University Hospital
Schleswig-Holstein, Campus Kiel, Christian-Albrechts University, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, LMU-University Hospital,
Ludwig-Maximilians-University, Munich, Germany
| | - Johannes Hensler
- Department of Radiology and Neuroradiology, University Hospital
Schleswig-Holstein, Campus Kiel, Christian-Albrechts University, Germany
| | - Olav Jansen
- Department of Radiology and Neuroradiology, University Hospital
Schleswig-Holstein, Campus Kiel, Christian-Albrechts University, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, LMU-University Hospital,
Ludwig-Maximilians-University, Munich, Germany
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8
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Haggenmüller B, Kreiser K, Sollmann N, Huber M, Vogele D, Schmidt SA, Beer M, Schmitz B, Ozpeynirci Y, Rosskopf J, Kloth C. Pictorial Review on Imaging Findings in Cerebral CTP in Patients with Acute Stroke and Its Mimics: A Primer for General Radiologists. Diagnostics (Basel) 2023; 13:diagnostics13030447. [PMID: 36766552 PMCID: PMC9914845 DOI: 10.3390/diagnostics13030447] [Citation(s) in RCA: 2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/19/2023] [Accepted: 01/21/2023] [Indexed: 01/28/2023] Open
Abstract
The imaging evaluation of computed tomography (CT), CT angiography (CTA), and CT perfusion (CTP) is of crucial importance in the setting of each emergency department for suspected cerebrovascular impairment. A fast and clear assignment of characteristic imaging findings of acute stroke and its differential diagnoses is essential for every radiologist. Different entities can mimic clinical signs of an acute stroke, thus the knowledge and fast identification of stroke mimics is important. A fast and clear assignment is necessary for a correct diagnosis and a rapid initiation of appropriate therapy. This pictorial review describes the most common imaging findings in CTP with clinical signs for acute stroke or other acute neurological disorders. The knowledge of these pictograms is therefore essential and should also be addressed in training and further education of radiologists.
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Affiliation(s)
- Benedikt Haggenmüller
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
- Correspondence:
| | - Kornelia Kreiser
- Department of Radiology and Neuroradiology, RKU—Universitäts- und Rehabilitationskliniken Ulm, Oberer Eselsberg 45, 89081 Ulm, Germany
| | - Nico Sollmann
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Magdalena Huber
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Daniel Vogele
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Stefan A. Schmidt
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Meinrad Beer
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Bernd Schmitz
- Department of Neuroradiology, Bezirkskrankenhaus Günzburg, Lindenallee 2, 89312 Günzburg, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - Johannes Rosskopf
- Department of Neuroradiology, Bezirkskrankenhaus Günzburg, Lindenallee 2, 89312 Günzburg, Germany
| | - Christopher Kloth
- Department of Diagnostic and Interventional Radiology, Ulm University Medical Center, Albert-Einstein-Allee 23, 89081 Ulm, Germany
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Ozpeynirci Y, Trumm CG, Stahl R, Liebig T, Forbrig R. Radiation Dose and Fluoroscopy Time of Endovascular Coil Embolization in Patients with Carotid Cavernous Fistulas. Diagnostics (Basel) 2022; 12:diagnostics12020531. [PMID: 35204620 PMCID: PMC8871160 DOI: 10.3390/diagnostics12020531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/17/2022] [Accepted: 02/17/2022] [Indexed: 11/16/2022] Open
Abstract
Carotid cavernous fistulas (CCFs) are abnormal connections between the cavernous sinus and the internal and/or external carotid artery. Endovascular therapy is the gold standard treatment. In the current retrospective single-center study we report detailed dosimetrics of all patients with CCFs treated by endovascular coil embolization between January 2012 and August 2021. Procedural and dosimetric data were compared between direct and indirect fistulas according to Barrow et al., and different DSA protocol groups. The local diagnostic reference level (DRL) was defined as the 3rd quartile of the dose distribution. In total, thirty patients met the study criteria. The local DRL was 376.2 Gy cm2. The procedural dose area product (DAP) (p = 0.03) and the number of implanted coils (p = 0.02) were significantly lower in direct fistulas. The median values for fluoroscopy time (FT) (p = 0.08) and number of DSA acquisitions (p = 0.84) were not significantly different between groups. There was a significantly positive correlation between DAP and FT (p = 0.003). The application of a dedicated low-dose protocol yielded a 32.6% DAP reduction. In conclusion, this study provides novel DRLs for endovascular CCF treatment using detachable coils. The data presented in this work might be used to establish new specific DRLs.
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Ozpeynirci Y, Trumm C, Stahl R, Fischer D, Liebig T, Forbrig R. Radiation Dose and Fluoroscopy Time of Diagnostic Angiography in Patients with Spinal Dural Arteriovenous Fistula. Clin Neuroradiol 2022; 32:791-797. [PMID: 34994809 PMCID: PMC9424156 DOI: 10.1007/s00062-021-01130-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/09/2021] [Accepted: 12/09/2021] [Indexed: 11/03/2022]
Abstract
PURPOSE Spinal dural arteriovenous fistulas (SDAVFs) represent the most common indication for a spinal angiography. The diagnostic reference level (DRL) for this specific endovascular procedure is still to be determined. This single-center study provides detailed dosimetrics of diagnostic spinal angiography performed in patients with SDAVFs. METHODS Retrospective analysis of all diagnostic spinal angiographies between December 2011 and January 2021. Only patients with an SDAVF who had baseline magnetic resonance angiography (MRA), diagnostic digital subtraction angiography (DSA), treatment and follow-up at this institution were included. Dose area product (DAP, Gy cm2) and fluoroscopy time were compared between preoperative and postoperative angiographies, according to SDAVF locations (common versus uncommon), MRA results at baseline (positive versus negative) and DSA protocols (low-dose, mixed-dose, normal-dose). The 75th percentile of the DAP distribution was used to define the local DRL. RESULTS A total of 62 spinal angiographies were performed in 25 patients with SDAVF. Preoperative angiographies (30/62, 48%) yielded a significantly higher DAP and longer fluoroscopy time when compared to postoperative angiographies (32/62, 53%) (p < 0.01). The local DRL was 329.41 Gy cm2 for a nonspecific (n = 62), 395.59 Gy cm2 for a preoperative and 138.6 Gy cm2 for a postoperative spinal angiography. Preoperative angiography of uncommonly located SDAVFs yielded a significantly longer fluoroscopy time (p = 0.02). The MRA-based fistula detection had no significant impact on dosimetrics (p > 0.05). A low-dose protocol yielded a 61% reduction of DAP. CONCLUSION The results of the present study suggest novel DRLs for spinal angiography in patients with SDAVF. Dedicated low-dose protocols enable radiation dose optimization in these procedures.
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Affiliation(s)
- Yigit Ozpeynirci
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany.
| | - Christoph Trumm
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Robert Stahl
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - David Fischer
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Thomas Liebig
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
| | - Robert Forbrig
- Klinikum Großhadern, Institut für Neuroradiologie, Ludwig Maximilians University, Marchioninistr. 15, 81377, Munich, Germany
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Forbrig R, Ozpeynirci Y, Grasser M, Dorn F, Liebig T, Trumm CG. Correction to: Radiation dose and fluoroscopy time of modern endovascular treatment techniques in patients with saccular unruptured intracranial aneurysms. Eur Radiol 2021; 31:8817. [PMID: 33938976 PMCID: PMC8523368 DOI: 10.1007/s00330-021-07874-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Correction to this paper has been published: 10.1007/s00330-021-07874-1
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | | | - Franziska Dorn
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Christoph G Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
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Forbrig R, Stahl R, Geyer LL, Ozpeynirci Y, Liebig T, Trumm CG. Radiation Dose and Fluoroscopy Time of Endovascular Treatment in Patients with Intracranial Lateral Dural Arteriovenous Fistulae. Clin Neuroradiol 2020; 31:1149-1157. [PMID: 33313974 PMCID: PMC8648699 DOI: 10.1007/s00062-020-00982-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/20/2020] [Indexed: 12/18/2022]
Abstract
Purpose Intracranial lateral dural arteriovenous fistula (LDAVF) represents a specific subtype of cerebrovascular fistulae, harboring a potentially life-threatening risk of brain hemorrhage. Fluoroscopically guided endovascular embolization is the therapeutic gold standard. We provide detailed dosimetry data to suggest novel diagnostic reference levels (DRL). Methods Retrospective single-center study of LDAVFs treated between January 2014 and December 2019. Regarding dosimetry, the dose area product (DAP) and fluoroscopy time were analyzed for the following variables: Cognard scale grade, endovascular technique, angiographic outcome, and digital subtraction angiography (DSA) protocol. Results A total of 70 patients (19 female, median age 65 years) were included. Total median values for DAP and fluoroscopy time were 325 Gy cm2 (25%/75% percentile: 245/414 Gy cm2) and 110 min (68/142min), respectively. Neither median DAP nor fluoroscopy time were significantly different when comparing low-grade with high-grade LDAVF (Cognard I + IIa versus IIb–V; p > 0.05, each). Transvenous coil embolization yielded the lowest dosimetry values, with significantly lower median values when compared to a combined transarterial/transvenous technique (DAP 290 Gy cm2 versus 388 Gy cm2, p = 0.031; fluoroscopy time 85 min versus 170 min, p = 0.016). A significant positive correlation was found between number of arterial feeders treated by liquid embolization and both DAP (rs = 0.367; p = 0.010) and fluoroscopy time (rs = 0.295; p = 0.040). Complete LDAVF occlusion was associated with transvenous coiling (p = 0.001). A low-dose DSA protocol yielded a 20% reduction of DAP (p = 0.021). Conclusion This LDAVF study suggests several local DRLs which varied substantially dependent on the endovascular technique and DSA protocol.
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Robert Stahl
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Lucas L. Geyer
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
| | - Christoph G. Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
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Ozpeynirci Y, Hutschenreuter B, Forbrig R, Brückmann H, Liebig T, Dorn F. Endovascular treatment of basilar tip aneurysms in the era of endosaccular flow disruption: a comparative study. Neuroradiology 2020; 63:619-626. [PMID: 32968826 PMCID: PMC7966124 DOI: 10.1007/s00234-020-02555-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/09/2020] [Indexed: 11/26/2022]
Abstract
Purpose This study aims to compare endosaccular flow disruptor (EFD) for treatment of basilar tip aneurysm (BTA) with coiling in terms of safety and efficacy. Methods We retrospectively reviewed patients treated with an EFD for BTAs at our institution between 2013 and 2019 to standard coiling from the same period (control group). Patient demographics, aneurysm characteristics, procedural data, complications and clinical and angiographic outcome were compared between groups. Results Twenty-three (56%) patients were treated with an EFD and eighteen (44%) patients were treated with coiling. Average aneurysm size was 8 mm in the EFD group and 6.9 mm in the coiling group, respectively (P = 0.2). Average fluoroscopy time, treatment DAP and air kerma were 33 min, 76 Gycm2 and 1.7 Gy in the EFD group and 81 min, 152 Gycm2 and 3.8 Gy in the coiling group, respectively (P < 0.001). In the EFD group, clinically relevant thromboembolic complications occurred in one patient (4%) vs. in 5 patients (28%) in the coiling group (P = 0.07). In each group, 4 patients had an unfavourable outcome at discharge (P = 0.7). Adequate occlusion rates were 96% in the EFD group and 100% and coiling group. Six (26%) patients were prescribed long-term antiplatelet therapy in the EFD group vs. eleven (61%) patients in the coiling group (P = 0.02). Conclusion Both treatment concepts provided similar technical success and safety. However, procedure time, radiation exposure and a need for long-term antiaggregation were lower with EFD.
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Affiliation(s)
- Yigit Ozpeynirci
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany.
| | | | - Robert Forbrig
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany
| | - Hartmut Brückmann
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany
| | - Thomas Liebig
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany
| | - Franziska Dorn
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany
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Rosskopf J, Braun M, Dreyhaupt J, Beer M, Schmitz BL, Ozpeynirci Y. Shape Modification is Common in Woven EndoBridge-Treated Intracranial Aneurysms: A Longitudinal Quantitative Analysis Study. AJNR Am J Neuroradiol 2020; 41:1652-1656. [PMID: 32732267 DOI: 10.3174/ajnr.a6669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/27/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE After endovascular treatment of intracranial aneurysms with the Woven EndoBridge (WEB) device, worsening of aneurysm occlusion or re-opening was reported to be possibly associated with WEB shape modification. This study analyzed quantitatively the WEB shape modification with time in association with anatomic results. MATERIALS AND METHODS Thirty patients with 32 WEB-treated intracranial aneurysms fulfilled the inclusion criteria of cranial CT at baseline (day of intervention) and a follow-up CT at least >1 months' later (median follow-up time, 11.4 months; interquartile range, 6.5-21.5 months). Adequate occlusion was observed in 84.4%, and aneurysm remnant, in 15.6%. WEB shape modification was quantified by a semiautomated approach on CT scans. Time courses were evaluated graphically and analytically; association analyses were performed by linear mixed-effects regression models. RESULTS In 29/32 WEB devices (90.6%), the reduction in height was found to be at least 5%. The decrease in height with time was significantly associated with the time interval in days since the intervention (P < .0001): A stronger decrease in WEB height was associated with a longer time since the intervention (median reduction in 1 year, 19.2%; range, 8.6%-52.3%). No significant association was found with the quality of aneurysm occlusion, device size, rupture status of the aneurysm, aneurysm location, and reintervention rate. CONCLUSIONS Shape modification was common in WEB-treated intracranial aneurysms with a median height reduction of 19.2% in 1 year. The quality of aneurysm occlusion was not associated with WEB modification.
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Affiliation(s)
- J Rosskopf
- From the Department of Radiology (J.R., M. Beer, B.L.S.)
| | - M Braun
- Department of Neuroradiology (M. Braun, B.L.S.), Bezirkskrankenhaus Günzburg, Günzburg, Germany
| | - J Dreyhaupt
- Institute of Epidemiology and Medical Biometry (J.D.), University of Ulm, Ulm, Germany
| | - M Beer
- From the Department of Radiology (J.R., M. Beer, B.L.S.)
| | - B L Schmitz
- From the Department of Radiology (J.R., M. Beer, B.L.S.).,Department of Neuroradiology (M. Braun, B.L.S.), Bezirkskrankenhaus Günzburg, Günzburg, Germany
| | - Y Ozpeynirci
- Institute of Neuroradiology (Y.O.), Ludwig Maximilian University, Munich, Germany
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Forbrig R, Ozpeynirci Y, Grasser M, Dorn F, Liebig T, Trumm CG. Radiation dose and fluoroscopy time of modern endovascular treatment techniques in patients with saccular unruptured intracranial aneurysms. Eur Radiol 2020; 30:4504-4513. [PMID: 32193640 PMCID: PMC8093177 DOI: 10.1007/s00330-020-06777-x] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 02/18/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023]
Abstract
Objectives Modern endovascular treatment of unruptured intracranial aneurysms (UIAs) demands for observance of diagnostic reference levels (DRLs). The national DRL (250 Gy cm2) is only defined for coiling. We provide dosimetric data for the following procedures: coiling, flow diverter (FD), Woven EndoBridge (WEB), combined techniques. Methods A retrospective single-centre study of saccular UIAs treated between 2015 and 2019. Regarding dosimetric analysis, the parameters dose area product (DAP) and fluoroscopy time were investigated for the following variables: endovascular technique, aneurysm location, DSA protocol, aneurysm size, and patient age. Results Eighty-seven patients (59 females, mean age 54 years) were included. Total mean and median DAP (Gy cm2) were 119 ± 73 (89–149) and 94 (73; 130) for coiling, 128 ± 53 (106–151) and 134 (80; 176) for FD, 128 ± 56 (102–153) and 118 (90; 176) for WEB, and 165 ± 102 (110–219) and 131 (98; 209) for combined techniques (p > .05). Regarding the aneurysm location, neither DAP nor fluoroscopy time was significantly different (p > .05). The lowest and highest fluoroscopy times were recorded for WEB and combined techniques, respectively (median 26 and 94 min; p < .001). A low-dose protocol yielded a 43% reduction of DAP (p < .001). Significantly positive correlations were found between DAP and both aneurysm size (r = .320, p = .003) and patient age (r = .214, p = .046). Conclusions This UIA study establishes novel local DRLs for modern endovascular techniques such as FD and WEB. A low-dose protocol yielded a significant reduction of radiation dose. Key Points • This paper establishes local diagnostic reference levels for modern endovascular treatment techniques of unruptured intracranial aneurysms, including flow diverter stenting and Woven EndoBridge device. • Dose area product was not significantly different between endovascular techniques and aneurysm locations, but associated with aneurysm size and patient age. • A low-dose protocol yielded a significant reduction of dose area product and is particularly useful when applying materials with a high radiopacity (e.g. platinum coils).
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Affiliation(s)
- Robert Forbrig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany.
| | - Yigit Ozpeynirci
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | | | - Franziska Dorn
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
| | - Christoph G Trumm
- Institute of Neuroradiology, University Hospital, LMU Munich, Marchioninistrasse 15, 81377, Munich, Germany
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Ozpeynirci Y, Capatana C, Rosskopf J, Schmitz BL, Hamann GF, Braun M. Emergency carotid artery revascularization using Casper-RX stent: A single-center experience. Interv Neuroradiol 2020; 26:433-438. [PMID: 32046548 DOI: 10.1177/1591019919900879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 11/17/2022] Open
Abstract
BACKGROUND Casper-RX (MicroVention, Aliso Viejo, California, USA) is a dual-layer closed cell stent recently introduced as a carotid artery revascularization device. Although its effectiveness and safety has been proved in elective cases, there are contradictive results regarding its patency in emergency settings. The purpose of the study is to present our single-center experience with the Casper-RX stent in the emergency interventions. PATIENTS AND METHODS Consecutive patients who underwent emergency carotid artery stenting using Casper-RX system with or without additional intracranial thrombectomy between August 2016 and June 2019 at our institution were included. Primary end point was the short-term patency of the carotid stents evaluated before hospital discharge by use of Doppler ultrasonography. RESULTS Twenty-nine procedures performed on 28 patients were included in the study. All stents were patent on final angiograms. Acute stent occlusion was observed only in one case (3.4%) with a spontaneous cervical internal carotid artery dissection the day after the procedure. In 26 (89.6%) cases, an additional intracranial thrombectomy was performed with a successful recanalization rate of 96.1%. Seven adverse events occurred peri-/post-procedural: two cases (6.9%) with iatrogenic dissection of distal cervical internal carotid artery during intracranial thrombectomy, two parenchymal hematoma type 2 (6.8%), and three patients (10.3%) developed massive infarction. CONCLUSION This study supports the safety and efficacy of the Casper-RX stent in emergency endovascular carotid artery revascularization procedures.
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Affiliation(s)
- Yigit Ozpeynirci
- Department of Neuroradiology, Ludwig Maximilian University, Munich, Germany
| | - Cristian Capatana
- Department of Neuroradiology, Bezirkskrankenhaus Gunzburg, Gunzburg, Germany
| | | | - Bernd L Schmitz
- Department of Neuroradiology, Bezirkskrankenhaus Gunzburg, Gunzburg, Germany.,Department of Neuroradiology, Ulm University, Ulm, Germany
| | - Gerhard F Hamann
- Clinic for Neurology and Neurologic Rehabilitation, Bezirkskrankenhaus Gunzburg, Gunzburg, Germany
| | - Michael Braun
- Department of Neuroradiology, Bezirkskrankenhaus Gunzburg, Gunzburg, Germany
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Ozpeynirci Y, Braun M, Pala A, Schick M, Schmitz B. WEB-only treatment of ruptured and unruptured intracranial aneurysms: a retrospective analysis of 47 aneurysms. Acta Neurochir (Wien) 2019; 161:1507-1513. [PMID: 31240584 DOI: 10.1007/s00701-019-03988-0] [Citation(s) in RCA: 15] [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: 04/25/2019] [Accepted: 06/17/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND WEB (Woven EndoBridge) device is an intrasaccular flow diverter designed for endovascular treatment of intracranial aneurysms. Recent clinical trials showed good feasibility, safety, and efficacy profiles. In most of the published studies however, aneurysms treated with adjunctive devices other than WEB such as coils or stents were included which might make it difficult to reflect the real potential of this device. The purpose of this single-center study was to present the results of ruptured and unruptured aneurysms treated only with WEB device. METHOD Between April 2013 and July 2018, 47 (ruptured, 12; 25.5%) intracranial aneurysms treated only with WEB and a follow-up of at least 3 months were included in the study. Angiographic outcome at follow-up, peri-procedural complication rate, and rate of retreatment were recorded. RESULTS Of the 47 aneurysms, 12 (25.5%) were ruptured. The mean size of the aneurysms was 6.3 mm (ruptured, 5.4 mm; unruptured, 6.6 mm). Median follow-up period was 9 months. Complete occlusion was observed in 26/47 aneurysms (55.3%; ruptured, 66.6%; unruptured, 51.4%). Thirteen aneurysms (27.6%; ruptured, 16.6%; unruptured, 31.4%) showed a neck remnant. In 4/47 aneurysms (8.5%; ruptured, 8%; unruptured, 8.5%), persistent contrast enhancement inside the WEB was recorded. In 4/47 patients (8.5%; ruptured, 8%; unruptured, 8.5%), an aneurysm remnant was noted. Adequate occlusion (complete occlusion and neck remnant) was observed in 43/47 aneurysms (91.4%; ruptured, 91.6%; unruptured, 91.4%). Retreatment rate was 6.3% (ruptured, 8%; unruptured, 5.7%). Six (12.7%; ruptured, 25%; unruptured, 8.5%) thromboembolic events were recorded. Hemorrhagic complications occurred in two patients (4.2%; ruptured, 16.6%; unruptured, 0%). CONCLUSIONS WEB enables adequate occlusion of ruptured and unruptured intracranial aneurysms mostly without requirement of long-term antiplatelet therapy. The benefit is seen especially by the wide-necked aneurysms, but indications should be extended to include narrow-necked, smaller, and side-wall aneurysms.
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Affiliation(s)
- Yigit Ozpeynirci
- Section of Neuroradiology, Bezirkskrankenhaus Gunzburg, Ulm University, Ludwig-Heilmeyer-Str. 2, 89312, Gunzburg, Germany.
| | - Michael Braun
- Section of Neuroradiology, Bezirkskrankenhaus Gunzburg, Ulm University, Ludwig-Heilmeyer-Str. 2, 89312, Gunzburg, Germany
| | - Andrej Pala
- Department of Neurosurgery, Ulm University, Gunzburg, Germany
| | - Melanie Schick
- Section of Neuroradiology, Bezirkskrankenhaus Gunzburg, Ulm University, Ludwig-Heilmeyer-Str. 2, 89312, Gunzburg, Germany
| | - Bernd Schmitz
- Section of Neuroradiology, Bezirkskrankenhaus Gunzburg, Ulm University, Ludwig-Heilmeyer-Str. 2, 89312, Gunzburg, Germany
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Ozpeynirci Y, Braun M, Lubotzki I, Schmitz B, Antoniadis G. Extra-foraminal Intraneural L5-S1 Disc Herniation Mimicking a Retroperitoneal Peripheral Nerve Sheath Tumour: Case Report and Review of the Literature. Cureus 2019; 11:e4956. [PMID: 31453029 PMCID: PMC6701918 DOI: 10.7759/cureus.4956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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] [Indexed: 12/14/2022] Open
Abstract
Disc herniations can present with unusual findings at unusual locations, mimic different pathologies and create confusion in the daily practice. Extra-foraminal intraneural location of L5-S1 disc herniation is extremely rare and may not be noticed on initial imaging extending the time to reach the diagnosis. There is no specific imaging finding suggesting the intraneural location of the lesion. Here, we report a case of an extra-foraminal intraneural L5-S1 disc herniation mimicking a retroperitoneal peripheral nerve sheath tumour and review similar cases in the literature.
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Ozpeynirci Y, Braun M, Schmitz B. CT Angiography in Occlusion Assessment of Intracranial Aneurysms Treated with the WEB Device. J Neuroimaging 2019; 29:481-486. [DOI: 10.1111/jon.12622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 04/11/2019] [Indexed: 11/29/2022] Open
Affiliation(s)
| | - Michael Braun
- Section of NeuroradiologyUlm University Gunzburg Germany
| | - Bernd Schmitz
- Section of NeuroradiologyUlm University Gunzburg Germany
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Abstract
Spinal dural arteriovenous fistulas (AVFs), being the most commonly encountered spinal vascular malformations, result in considerable morbidity with progressive spinal cord symptoms. A selective spinal digital subtraction angiography (DSA) is needed to confirm the diagnosis, to better evaluate the fine vascular structures and to plan therapy. With the introduction of three-dimensional rotational angiography (3D-RA), the information available for the treating physician has vastly increased. In the following article, we present a case series of four patients, in which the advantages of 3D-RA over the conventional biplane projections could be observed clearly.
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Geibel M, Schreiber E, Bracher A, Hell E, Ulrici J, Sailer L, Ozpeynirci Y, Rasche V. Assessment of Apical Periodontitis by MRI: A Feasibility Study. ROFO-FORTSCHR RONTG 2015; 187:269-75. [DOI: 10.1055/s-0034-1385808] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- M. Geibel
- Oral and Maxillofacial Surgery, Ulm University, Ulm
| | - E. Schreiber
- Internal Medicine II, Ulm University, Ulm, Germany
| | - A. Bracher
- Internal Medicine II, Ulm University, Ulm, Germany
| | - E. Hell
- Dental Imaging, Sirona Dental Systems GmbH, Bensheim, Germany
| | - J. Ulrici
- Dental Imaging, Sirona Dental Systems GmbH, Bensheim, Germany
| | - L. Sailer
- MKG, DOC Praxisklinik im Wiley, Neu-Ulm, Germany
| | - Y. Ozpeynirci
- Diagnostic and Interventional Radiology, Ulm University, Ulm, Germany
| | - V. Rasche
- Internal Medicine II, Ulm University, Ulm, Germany
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