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Rivera-Rivera LA, Roberts GS, Peret A, Langhough RE, Jonaitis EM, Du L, Field A, Eisenmenger L, Johnson SC, Johnson KM. Unraveling diurnal and technical variability in cerebral hemodynamics from neurovascular 4D-Flow MRI. J Cereb Blood Flow Metab 2024; 44:1362-1375. [PMID: 38340787 PMCID: PMC11342721 DOI: 10.1177/0271678x241232190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 12/20/2023] [Accepted: 12/30/2023] [Indexed: 02/12/2024]
Abstract
Neurovascular 4D-Flow MRI enables non-invasive evaluation of cerebral hemodynamics including measures of cerebral blood flow (CBF), vessel pulsatility index (PI), and cerebral pulse wave velocity (PWV). 4D-Flow measures have been linked to various neurovascular disorders including small vessel disease and Alzheimer's disease; however, physiological and technical sources of variability are not well established. Here, we characterized sources of diurnal physiological and technical variability in cerebral hemodynamics using 4D-Flow in a retrospective study of cognitively unimpaired older adults (N = 750) and a prospective study of younger adults (N = 10). Younger participants underwent repeated MRI sessions at 7am, 4 pm, and 10 pm. In the older cohort, having an MRI earlier on the day was significantly associated with higher CBF and lower PI. In prospective experiments, time of day significantly explained variability in CBF and PI; however, not in PWV. Test-retest experiments showed high CBF intra-session repeatability (repeatability coefficient (RPC) =7.2%), compared to lower diurnal repeatability (RPC = 40%). PI and PWV displayed similar intra-session and diurnal variability (PI intra-session RPC = 22%, RPC = 24% 7am vs 4 pm; PWV intra-session RPC = 17%, RPC = 21% 7am vs 4 pm). Overall, CBF measures showed low technical variability, supporting diurnal variability is from physiology. PI and PWV showed higher technical variability but less diurnal variability.
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Affiliation(s)
- Leonardo A Rivera-Rivera
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Grant S Roberts
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Anthony Peret
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Rebecca E Langhough
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Erin M Jonaitis
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Lianlian Du
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Aaron Field
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Laura Eisenmenger
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Sterling C Johnson
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Kevin M Johnson
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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2
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Rivera-Rivera LA, Vikner T, Eisenmenger L, Johnson SC, Johnson KM. Four-dimensional flow MRI for quantitative assessment of cerebrospinal fluid dynamics: Status and opportunities. NMR IN BIOMEDICINE 2024; 37:e5082. [PMID: 38124351 PMCID: PMC11162953 DOI: 10.1002/nbm.5082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 10/03/2023] [Accepted: 11/07/2023] [Indexed: 12/23/2023]
Abstract
Neurological disorders can manifest with altered neurofluid dynamics in different compartments of the central nervous system. These include alterations in cerebral blood flow, cerebrospinal fluid (CSF) flow, and tissue biomechanics. Noninvasive quantitative assessment of neurofluid flow and tissue motion is feasible with phase contrast magnetic resonance imaging (PC MRI). While two-dimensional (2D) PC MRI is routinely utilized in research and clinical settings to assess flow dynamics through a single imaging slice, comprehensive neurofluid dynamic assessment can be limited or impractical. Recently, four-dimensional (4D) flow MRI (or time-resolved three-dimensional PC with three-directional velocity encoding) has emerged as a powerful extension of 2D PC, allowing for large volumetric coverage of fluid velocities at high spatiotemporal resolution within clinically reasonable scan times. Yet, most 4D flow studies have focused on blood flow imaging. Characterizing CSF flow dynamics with 4D flow (i.e., 4D CSF flow) is of high interest to understand normal brain and spine physiology, but also to study neurological disorders such as dysfunctional brain metabolite waste clearance, where CSF dynamics appear to play an important role. However, 4D CSF flow imaging is challenged by the long T1 time of CSF and slower velocities compared with blood flow, which can result in longer scan times from low flip angles and extended motion-sensitive gradients, hindering clinical adoption. In this work, we review the state of 4D CSF flow MRI including challenges, novel solutions from current research and ongoing needs, examples of clinical and research applications, and discuss an outlook on the future of 4D CSF flow.
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Affiliation(s)
- Leonardo A Rivera-Rivera
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Tomas Vikner
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Radiation Sciences, Radiation Physics and Biomedical Engineering, Umeå University, Umeå, Sweden
| | - Laura Eisenmenger
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Sterling C Johnson
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Kevin M Johnson
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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Vikström A, Holmlund P, Holmgren M, Wåhlin A, Zarrinkoob L, Malm J, Eklund A. Establishing the distribution of cerebrovascular resistance using computational fluid dynamics and 4D flow MRI. Sci Rep 2024; 14:14585. [PMID: 38918589 PMCID: PMC11199643 DOI: 10.1038/s41598-024-65431-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 06/20/2024] [Indexed: 06/27/2024] Open
Abstract
Cerebrovascular resistance (CVR) regulates blood flow in the brain, but little is known about the vascular resistances of the individual cerebral territories. We present a method to calculate these resistances and investigate how CVR varies in the hemodynamically disturbed brain. We included 48 patients with stroke/TIA (29 with symptomatic carotid stenosis). By combining flow rate (4D flow MRI) and structural computed tomography angiography (CTA) data with computational fluid dynamics (CFD) we computed the perfusion pressures out from the circle of Willis, with which CVR of the MCA, ACA, and PCA territories was estimated. 56 controls were included for comparison of total CVR (tCVR). CVR were 33.8 ± 10.5, 59.0 ± 30.6, and 77.8 ± 21.3 mmHg s/ml for the MCA, ACA, and PCA territories. We found no differences in tCVR between patients, 9.3 ± 1.9 mmHg s/ml, and controls, 9.3 ± 2.0 mmHg s/ml (p = 0.88), nor in territorial CVR in the carotid stenosis patients between ipsilateral and contralateral hemispheres. Territorial resistance associated inversely to territorial brain volume (p < 0.001). These resistances may work as reference values when modelling blood flow in the circle of Willis, and the method can be used when there is need for subject-specific analysis.
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Affiliation(s)
- Axel Vikström
- Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden.
| | - Petter Holmlund
- Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden
- Department of Applied Physics and Electronics, Umeå University, Umeå, Sweden
| | - Madelene Holmgren
- Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden
- Department of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden
| | - Anders Wåhlin
- Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden
- Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
- Department of Applied Physics and Electronics, Umeå University, Umeå, Sweden
| | - Laleh Zarrinkoob
- Department of Diagnostics and Intervention, Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - Jan Malm
- Department of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden
| | - Anders Eklund
- Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden
- Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
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Ghibes P, Martirosian P, Grözinger G, Plajer D, Estler A, Partovi S. Quantitative Flow Measurements of Pelvic Venous Vasculature Using 4D Flow MRI. Acad Radiol 2024; 31:929-938. [PMID: 37714720 DOI: 10.1016/j.acra.2023.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/08/2023] [Accepted: 08/12/2023] [Indexed: 09/17/2023]
Abstract
RATIONALE AND OBJECTIVES To evaluate 4D Flow magnetic resonance imaging (MRI) sequences for quantitative flow measurements of the pelvic venous vasculature. MATERIALS AND METHODS A prospective study of healthy volunteers was performed. After informed consent all subjects underwent 4D flow sequences at a 3 T MRI scanner with different isotropic resolution and different velocity encoding (Venc) settings: (sequence #1) voxel size (VS) 1.63 mm3, Venc 50 cm/s; (sequence #2) VS 1.63 mm3, Venc 100 cm/s and (sequence #3) VS 2.03 mm3, Venc 50 cm/s. Perfusion parameters were calculated for all venous vessel segments starting at the level of the inferior vena cava and extending caudally to the level of the common femoral vein. For reference, arterial flow was calculated using 1.63 mm3 isotropic resolution with a Venc of 100 cm/s. RESULTS Ten healthy subjects (median age 28 years, interquartile range [IQR]: 26.25-28 years) were enrolled in this study. Median scanning time was 12:12 minutes (IQR 10:22-13:32 minutes) for sequence #1, 11:02 minutes (IQR 9:57-11:19 minutes) for sequence #2 and 6:10 minutes (IQR 5:44-6:47 minutes) for sequence #3. Flow measurements were derived from all sequences. The venous pelvic vasculature showed similar perfusion parameters compared to its arterial counterpart, for example the right common iliac arterial segment showed a perfusion of 8.32 ml/s (IQR: 6.94-10.68 ml/s) versus 7.29 ml/s (IQR: 4.70-8.90 ml/s) in the corresponding venous segment (P = 0.218). The venous flow measurements obtained from the three investigated sequences did not reveal significant differences. CONCLUSION 4D Flow MRI is suitable for quantitative flow measurement of the venous pelvic vasculature. To reduce the scanning time without compromising quantitative results, the resolution can be decreased while increasing the Venc. This technique may be utilized in the future for the diagnosis and treatment response assessment of iliac vein compression syndromes.
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Affiliation(s)
- Patrick Ghibes
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Strasse 3, 72076 Tuebingen, Germany (P.G., G.G., D.P.).
| | - Petros Martirosian
- Section on Experimental Radiology, University Hospital Tuebingen, Tuebingen, Germany (P.M.)
| | - Gerd Grözinger
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Strasse 3, 72076 Tuebingen, Germany (P.G., G.G., D.P.)
| | - David Plajer
- Department for Diagnostic and Interventional Radiology, University Hospital Tuebingen, Hoppe-Seyler-Strasse 3, 72076 Tuebingen, Germany (P.G., G.G., D.P.)
| | - Arne Estler
- Diagnostic and Interventional Neuroradiology, Department of Radiology, University Hospital Tuebingen, Tuebingen, Germany (A.E.)
| | - Sasan Partovi
- Interventional Radiology Section, Imaging Institute, Cleveland Clinic Main Campus, Cleveland, Ohio (S.P.)
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Zeng W, Weng C, Yuan D, Wang T, Huang B, Zhao J, Xia C, Li Z, Wang J. Multimodality magnetic resonance evaluating the effect of enhanced physical exercise on the growth rate, flow haemodynamics, aneurysm wall and ventricular-aortic coupling of patients with small abdominal aortic aneurysms (AAA MOVE trial): a study protocol for an open-label randomised controlled trial. BMJ Open 2024; 14:e080073. [PMID: 38355193 PMCID: PMC10868247 DOI: 10.1136/bmjopen-2023-080073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/24/2024] [Indexed: 02/16/2024] Open
Abstract
INTRODUCTION The best lifestyle for small abdominal aortic aneurysms (sAAA) is essential for its conservative management. Physical exercise can improve the cardiopulmonary function of the patients, but it remains unclear which specific type of exercise is most beneficial for individuals with sAAA. The current study was designed to investigate the effect of physician-guided enhanced physical exercise programme on the aorto-cardiac haemodynamic environment, aneurysm sac wall, cardiac function and growth rate of sAAA by multimodality MRI. METHODS AND ANALYSIS AAA MOVE study is a prospective, parallel, equivalence, randomised controlled trial. Eligible individuals will be recruited if they are diagnosed with sAAA (focal dilation of abdominal aorta with maximum diameter <5 cm), without contraindication for MRI scanning, or severe heart failure, or uncontrolled arrhythmia. Participants will be randomly allocated to intervention group (physician-guided enhanced physical exercise programme: mainly aerobic training) and control group (standard clinical care) separately in a 1:1 ratio. The primary outcome is 12-month growth rate of sAAA. The first set of secondary outcomes involve multimodality MRI parameters covering flow haemodynamics, aortic wall inflammation and cardiac function. The other secondary outcome (safety end point) is a composite of exercise-related injury, aneurysm rupture and aneurysm intervention. Follow-up will be conducted at 6 and 12 months after intervention. ETHICS AND DISSEMINATION This study was approved by the Ethics Committee on Biomedical Research of West China Hospital (approval number: 2023-783) on 16 June 2023. Main findings from the trial will be disseminated through presentations at conferences, peer-reviewed publications and directly pushed to smartphone of participants. TRIAL REGISTRATION NUMBER ChiCTR2300073334.
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Affiliation(s)
- Wen Zeng
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chengxin Weng
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ding Yuan
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Tiehao Wang
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Bin Huang
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jichun Zhao
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chunchao Xia
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhenlin Li
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jiarong Wang
- Division of vascular surgery, Department of general surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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6
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Wieben O, Roberts GS, Corrado PA, Johnson KM, Roldán-Alzate A. Four-Dimensional Flow MR Imaging: Technique and Advances. Magn Reson Imaging Clin N Am 2023; 31:433-449. [PMID: 37414470 DOI: 10.1016/j.mric.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
4D Flow MRI is an advanced imaging technique for comprehensive non-invasive assessment of the cardiovascular system. The capture of the blood velocity vector field throughout the cardiac cycle enables measures of flow, pulse wave velocity, kinetic energy, wall shear stress, and more. Advances in hardware, MRI data acquisition and reconstruction methodology allow for clinically feasible scan times. The availability of 4D Flow analysis packages allows for more widespread use in research and the clinic and will facilitate much needed multi-center, multi-vendor studies in order to establish consistency across scanner platforms and to enable larger scale studies to demonstrate clinical value.
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Affiliation(s)
- Oliver Wieben
- Department of Medical Physics, University of Wisconsin-Madison, Wisconsin Institutes for Medical Research, 1111 Highland Avenue, Suite 1127, Madison, WI 53705-2275, USA; Department of Radiology, University of Wisconsin-Madison, Wisconsin Institutes for Medical Research, 1111 Highland Avenue, Suite 1127, Madison, WI 53705-2275, USA.
| | - Grant S Roberts
- Department of Medical Physics, University of Wisconsin-Madison, Wisconsin Institutes for Medical Research, 1111 Highland Avenue, Madison, WI 53705-2275, USA
| | - Philip A Corrado
- Accuray Incorporated, 1414 Raleigh Road, Suite 330, DurhamChapel Hill, NC 27517, USA
| | - Kevin M Johnson
- Department of Medical Physics, University of Wisconsin-Madison, Wisconsin Institutes for Medical Research, 1111 Highland Avenue, Room 1133, Madison, WI 53705-2275, USA; Department of Radiology, University of Wisconsin-Madison, Wisconsin Institutes for Medical Research, 1111 Highland Avenue, Room 1133, Madison, WI 53705-2275, USA
| | - Alejandro Roldán-Alzate
- Department of Mechanical Engineering, University of Wisconsin-Madison, Room: 3035, 1513 University Avenue, Madison, WI 53706, USA; Department of Radiology, University of Wisconsin-Madison, Madison, WI, USA
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7
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Roberts GS, Peret A, Jonaitis EM, Koscik RL, Hoffman CA, Rivera-Rivera LA, Cody KA, Rowley HA, Johnson SC, Wieben O, Johnson KM, Eisenmenger LB. Normative Cerebral Hemodynamics in Middle-aged and Older Adults Using 4D Flow MRI: Initial Analysis of Vascular Aging. Radiology 2023; 307:e222685. [PMID: 36943077 PMCID: PMC10140641 DOI: 10.1148/radiol.222685] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/06/2023] [Accepted: 02/06/2023] [Indexed: 03/23/2023]
Abstract
Background Characterizing cerebrovascular hemodynamics in older adults is important for identifying disease and understanding normal neurovascular aging. Four-dimensional (4D) flow MRI allows for a comprehensive assessment of cerebral hemodynamics in a single acquisition. Purpose To establish reference intracranial blood flow and pulsatility index values in a large cross-sectional sample of middle-aged (45-65 years) and older (>65 years) adults and characterize the effect of age and sex on blood flow and pulsatility. Materials and Methods In this retrospective study, patients aged 45-93 years (cognitively unimpaired) underwent cranial 4D flow MRI between March 2010 and March 2020. Blood flow rates and pulsatility indexes from 13 major arteries and four venous sinuses and total cerebral blood flow were collected. Intraobserver and interobserver reproducibility of flow and pulsatility measures was assessed in 30 patients. Descriptive statistics (mean ± SD) of blood flow and pulsatility were tabulated for the entire group and by age and sex. Multiple linear regression and linear mixed-effects models were used to assess the effect of age and sex on total cerebral blood flow and vessel-specific flow and pulsatility, respectively. Results There were 759 patients (mean age, 65 years ± 8 [SD]; 506 female patients) analyzed. For intra- and interobserver reproducibility, median intraclass correlation coefficients were greater than 0.90 for flow and pulsatility measures across all vessels. Regression coefficients β ± standard error from multiple linear regression showed a 4 mL/min decrease in total cerebral blood flow each year (age β = -3.94 mL/min per year ± 0.44; P < .001). Mixed effects showed a 1 mL/min average annual decrease in blood flow (age β = -0.95 mL/min per year ± 0.16; P < .001) and 0.01 arbitrary unit (au) average annual increase in pulsatility over all vessels (age β = 0.011 au per year ± 0.001; P < .001). No evidence of sex differences was observed for flow (β = -1.60 mL/min per male patient ± 1.77; P = .37), but pulsatility was higher in female patients (sex β = -0.018 au per male patient ± 0.008; P = .02). Conclusion Normal reference values for blood flow and pulsatility obtained using four-dimensional flow MRI showed correlations with age. © RSNA, 2023 Supplemental material is available for this article. See also the editorial by Steinman in this issue.
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Affiliation(s)
- Grant S. Roberts
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Anthony Peret
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Erin M. Jonaitis
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Rebecca L. Koscik
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Carson A. Hoffman
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Leonardo A. Rivera-Rivera
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Karly A. Cody
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Howard A. Rowley
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Sterling C. Johnson
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Oliver Wieben
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Kevin M. Johnson
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
| | - Laura B. Eisenmenger
- From the Department of Medical Physics (G.S.R., L.A.R.R., O.W.,
K.M.J.), Department of Radiology (A.P., C.A.H., H.A.R., O.W., K.M.J., L.B.E.),
Wisconsin Alzheimer’s Institute (E.M.J., R.L.K., S.C.J.), and Wisconsin
Alzheimer’s Disease Research Center (E.M.J., L.A.R.R., K.A.C., S.C.J.),
University of Wisconsin School of Medicine and Public Health, 600 Highland Ave,
Madison, WI 53792-3252; and Geriatric Research Education and Clinical Center,
William S. Middleton Memorial Veterans Hospital, Madison, Wis (S.C.J.)
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8
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Yin Q, Qi G, Wang S, Tian H, Gao X, Zhang Z, Hao L. Magnetic resonance/fluorescence dual-modality contrast agents targeting α vβ 6-overexpressing tumors based on A20FMDV2 peptide as a ligand. Biochem Biophys Res Commun 2023; 664:86-93. [PMID: 37141641 DOI: 10.1016/j.bbrc.2023.04.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/05/2023] [Accepted: 04/20/2023] [Indexed: 05/06/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a malignant digestive system tumor with a poor late-stage prognosis. This study aimed to identify new methods for the early detection of PDAC. The nanoprobe A20FMDV2-Gd-5-FAM was developed using A20FMDV2 (N1AVPNLRGDLQVLAQKVART20-NH2, A20FMDV2) as the ligand and characterized using dynamic light scattering, transmission electron microscopy, Fourier transform infrared analysis, and UV absorption spectroscopy. The binding of pancreatic cancer cells AsPC-1, MIA PaCa-2, and normal human pancreatic H6C7 cells (HPDE6-C7) to the probe was verified using laser confocal microscopy, and the biocompatibility of the probe was evaluated in vivo. In vivo magnetic resonance and fluorescence imaging were also performed on nude mice with subcutaneous pancreatic tumor xenografts to verify the bimodal imaging performance of the probe. The probe exhibited good stability and biocompatibility and an enhanced relaxation rate (25.46 ± 1.32 mM-1 s-1) than Gd-DTPA. Confocal laser scanning microscopy results revealed that the A20FMDV2-Gd-5-FAM probe could be successfully ingested and internalized, and infrared analysis results demonstrated that the probe was linked successfully. Finally, magnetic resonance T1WI imaging and intravital fluorescence imaging demonstrated the specific signal enhancement of the probe at the tumor site. In conclusion, the bimodal molecular probe A20FMDV2-Gd-5-FAM showed a stable magnetic resonance and fluorescence bimodal imaging performance and is a promising new approach for diagnosing early-stage cancers with a high integrin αvβ6 expression.
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Affiliation(s)
- Qiangqiang Yin
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Guiqiang Qi
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Shengchao Wang
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Hongda Tian
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Xiaolong Gao
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Zhichen Zhang
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Liguo Hao
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China.
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9
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Steinman DA. Comprehensive Atlases of Intracranial Blood Flow Rates: A Hard Nut Finally Cracks? Radiology 2023; 307:e230381. [PMID: 36943083 DOI: 10.1148/radiol.230381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Affiliation(s)
- David A Steinman
- From the University of Toronto, 5 King's College Rd, Toronto, ON, Canada M5S 3G8
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10
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Rivera-Rivera LA, Kecskemeti S, Jen ML, Miller Z, Johnson SC, Eisenmenger L, Johnson KM. Motion-corrected 4D-Flow MRI for neurovascular applications. Neuroimage 2022; 264:119711. [PMID: 36307060 PMCID: PMC9801539 DOI: 10.1016/j.neuroimage.2022.119711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/10/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022] Open
Abstract
Neurovascular 4D-Flow MRI has emerged as a powerful tool for comprehensive cerebrovascular hemodynamic characterization. Clinical studies in at risk populations such as aging adults indicate hemodynamic markers can be confounded by motion-induced bias. This study develops and characterizes a high fidelity 3D self-navigation approach for retrospective rigid motion correction of neurovascular 4D-Flow data. A 3D radial trajectory with pseudorandom ordering was combined with a multi-resolution low rank regularization approach to enable high spatiotemporal resolution self-navigators from extremely undersampled data. Phantom and volunteer experiments were performed at 3.0T to evaluate the ability to correct for different amounts of induced motions. In addition, the approach was applied to clinical-research exams from ongoing aging studies to characterize performance in the clinical setting. Simulations, phantom and volunteer experiments with motion correction produced images with increased vessel conspicuity, reduced image blurring, and decreased variability in quantitative measures. Clinical exams revealed significant changes in hemodynamic parameters including blood flow rates, flow pulsatility index, and lumen areas after motion correction in probed cerebral arteries (Flow: P<0.001 Lt ICA, P=0.002 Rt ICA, P=0.004 Lt MCA, P=0.004 Rt MCA; Area: P<0.001 Lt ICA, P<0.001 Rt ICA, P=0.004 Lt MCA, P=0.004 Rt MCA; flow pulsatility index: P=0.042 Rt ICA, P=0.002 Lt MCA). Motion induced bias can lead to significant overestimation of hemodynamic markers in cerebral arteries. The proposed method reduces measurement bias from rigid motion in neurovascular 4D-Flow MRI in challenging populations such as aging adults.
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Affiliation(s)
- Leonardo A Rivera-Rivera
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave, Rm 1005, Madison, WI, 53705-2275, United States; Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, 53792, United States
| | - Steve Kecskemeti
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave, Rm 1005, Madison, WI, 53705-2275, United States
| | - Mu-Lan Jen
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave, Rm 1005, Madison, WI, 53705-2275, United States
| | - Zachary Miller
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave, Rm 1005, Madison, WI, 53705-2275, United States
| | - Sterling C Johnson
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, 53792, United States
| | - Laura Eisenmenger
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, 53792, United States
| | - Kevin M Johnson
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave, Rm 1005, Madison, WI, 53705-2275, United States; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, 53792, United States.
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11
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Wang M, Yang Y, Zhang W, Zhou F, Zhang X, Zhang J, Zhang B. Risk Factors for Cerebrovascular Events in Moyamoya Angiopathy Using
4D
Flow
MRI
: A Pilot Study. J Magn Reson Imaging 2022. [DOI: 10.1002/jmri.28522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 11/10/2022] Open
Affiliation(s)
- Maoxue Wang
- Department of Radiology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
| | - Yongbo Yang
- Department of Neurosurgery The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
| | - Wen Zhang
- Department of Radiology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
| | - Fei Zhou
- Department of Radiology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
| | - Xin Zhang
- Department of Radiology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
| | | | - Bing Zhang
- Department of Radiology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing Jiangsu China
- Institute of Medical Imaging and Artificial Intelligence Nanjing University Nanjing Jiangsu China
- Jiangsu Key Laboratory of Molecular Medicine Nanjing Jiangsu China
- Institute of Brain Science Nanjing University Nanjing Jiangsu China
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12
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Vikner T, Karalija N, Eklund A, Malm J, Lundquist A, Gallewicz N, Dahlin M, Lindenberger U, Riklund K, Bäckman L, Nyberg L, Wåhlin A. 5-Year Associations among Cerebral Arterial Pulsatility, Perivascular Space Dilation, and White Matter Lesions. Ann Neurol 2022; 92:871-881. [PMID: 36054261 PMCID: PMC9804392 DOI: 10.1002/ana.26475] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 01/05/2023]
Abstract
OBJECTIVE High cerebral arterial pulsatility index (PI), white matter lesions (WMLs), enlarged perivascular spaces (PVSs), and lacunar infarcts are common findings in the elderly population, and considered indicators of small vessel disease (SVD). Here, we investigate the potential temporal ordering among these variables, with emphasis on determining whether high PI is an early or delayed manifestation of SVD. METHODS In a population-based cohort, 4D flow MRI data for cerebral arterial pulsatility was collected for 159 participants at baseline (age 64-68), and for 122 participants at follow-up 5 years later. Structural MRI was used for WML and PVS segmentation, and lacune identification. Linear mixed-effects (LME) models were used to model longitudinal changes testing for pairwise associations, and latent change score (LCS) models to model multiple relationships among variables simultaneously. RESULTS Longitudinal 5-year increases were found for WML, PVS, and PI. Cerebral arterial PI at baseline did not predict changes in WML or PVS volume. However, WML and PVS volume at baseline predicted 5-year increases in PI. This was shown for PI increases in relation to baseline WML and PVS volumes using LME models (R ≥ 0.24; p < 0.02 and R ≥ 0.23; p < 0.03, respectively) and LCS models ( β = 0.28; p = 0.015 and β = 0.28; p = 0.009, respectively). Lacunes at baseline were unrelated to PI. INTERPRETATION In healthy older adults, indicators of SVD are related in a lead-lag fashion, in which the expression of WML and PVS precedes increases in cerebral arterial PI. Hence, we propose that elevated PI is a relatively late manifestation, rather than a risk factor, for cerebral SVD. ANN NEUROL 2022;92:871-881.
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Affiliation(s)
- Tomas Vikner
- Department of Radiation SciencesUmeå UniversityUmeåSweden
| | - Nina Karalija
- Department of Radiation SciencesUmeå UniversityUmeåSweden
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
| | - Anders Eklund
- Department of Radiation SciencesUmeå UniversityUmeåSweden
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
| | - Jan Malm
- Department of Clinical Science, NeurosciencesUmeå UniversityUmeåSweden
| | - Anders Lundquist
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
- Department of Statistics, USBEUmeå UniversityUmeåSweden
| | | | - Magnus Dahlin
- Department of Radiation SciencesUmeå UniversityUmeåSweden
| | - Ulman Lindenberger
- Center for Lifespan PsychologyMax Planck Institute for Human DevelopmentBerlinGermany
- Max PlanckUCL Centre for Computational Psychiatry and Ageing ResearchBerlinGermany
- Max PlanckUCL Centre for Computational Psychiatry and Ageing ResearchLondonUK
| | - Katrine Riklund
- Department of Radiation SciencesUmeå UniversityUmeåSweden
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
| | - Lars Bäckman
- Ageing Research CenterKarolinska Institutet and Stockholm UniversityStockholmSweden
| | - Lars Nyberg
- Department of Radiation SciencesUmeå UniversityUmeåSweden
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
- Department of Integrative Medical Biology (IMB)Umeå UniversityUmeåSweden
| | - Anders Wåhlin
- Department of Radiation SciencesUmeå UniversityUmeåSweden
- Umeå Center for Functional Brain Imaging (UFBI)Umeå UniversityUmeåSweden
- Department of Applied Physics and ElectronicsUmeå UniversityUmeåSweden
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13
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Morphological changes in vertebral artery dissections observed on 4D flow magnetic resonance images: case report. Acta Neurochir (Wien) 2022; 164:2881-2886. [PMID: 35948733 DOI: 10.1007/s00701-022-05333-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 07/20/2022] [Indexed: 02/01/2023]
Abstract
The morphology of vertebral artery (VA) dissections can change in the clinical course. A 58-year-old female with a 2-week headache was diagnosed with left VA dissection. Hemodynamic stress on the right VA detected on 4D flow MRI scans resulted in increased wall shear stress but the vessel was morphologically unchanged. Subsequent MRA revealed right VA dissection. Her bilateral dissections were treated conservatively and no neurological abnormality developed. Serial 4D flow MRI may be useful for observing morphological changes in VA dissections and help to clarify the mechanism(s) underlying VA dissections.
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14
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Sakai Y, Lehman VT, Eisenmenger LB, Obusez EC, Kharal GA, Xiao J, Wang GJ, Fan Z, Cucchiara BL, Song JW. Vessel wall MR imaging of aortic arch, cervical carotid and intracranial arteries in patients with embolic stroke of undetermined source: A narrative review. Front Neurol 2022; 13:968390. [PMID: 35968273 PMCID: PMC9366886 DOI: 10.3389/fneur.2022.968390] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 07/01/2022] [Indexed: 11/13/2022] Open
Abstract
Despite advancements in multi-modal imaging techniques, a substantial portion of ischemic stroke patients today remain without a diagnosed etiology after conventional workup. Based on existing diagnostic criteria, these ischemic stroke patients are subcategorized into having cryptogenic stroke (CS) or embolic stroke of undetermined source (ESUS). There is growing evidence that in these patients, non-cardiogenic embolic sources, in particular non-stenosing atherosclerotic plaque, may have significant contributory roles in their ischemic strokes. Recent advancements in vessel wall MRI (VW-MRI) have enabled imaging of vessel walls beyond the degree of luminal stenosis, and allows further characterization of atherosclerotic plaque components. Using this imaging technique, we are able to identify potential imaging biomarkers of vulnerable atherosclerotic plaques such as intraplaque hemorrhage, lipid rich necrotic core, and thin or ruptured fibrous caps. This review focuses on the existing evidence on the advantages of utilizing VW-MRI in ischemic stroke patients to identify culprit plaques in key anatomical areas, namely the cervical carotid arteries, intracranial arteries, and the aortic arch. For each anatomical area, the literature on potential imaging biomarkers of vulnerable plaques on VW-MRI as well as the VW-MRI literature in ESUS and CS patients are reviewed. Future directions on further elucidating ESUS and CS by the use of VW-MRI as well as exciting emerging techniques are reviewed.
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Affiliation(s)
- Yu Sakai
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Vance T. Lehman
- Department of Radiology, The Mayo Clinic, Rochester, MN, United States
| | - Laura B. Eisenmenger
- Department of Radiology, University of Wisconsin-Madison, Madison, WI, United States
| | | | - G. Abbas Kharal
- Department of Neurology, Cerebrovascular Center, Neurological Institute, Cleveland, OH, United States
| | - Jiayu Xiao
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
| | - Grace J. Wang
- Department of Vascular Surgery and Endovascular Therapy, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Zhaoyang Fan
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
| | - Brett L. Cucchiara
- Department of Neurology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Jae W. Song
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
- *Correspondence: Jae W. Song
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15
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Nilsson DPG, Holmgren M, Holmlund P, Wåhlin A, Eklund A, Dahlberg T, Wiklund K, Andersson M. Patient-specific brain arteries molded as a flexible phantom model using 3D printed water-soluble resin. Sci Rep 2022; 12:10172. [PMID: 35715506 PMCID: PMC9205921 DOI: 10.1038/s41598-022-14279-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/03/2022] [Indexed: 11/08/2022] Open
Abstract
Visualizing medical images from patients as physical 3D models (phantom models) have many roles in the medical field, from education to preclinical preparation and clinical research. However, current phantom models are generally generic, expensive, and time-consuming to fabricate. Thus, there is a need for a cost- and time-efficient pipeline from medical imaging to patient-specific phantom models. In this work, we present a method for creating complex 3D sacrificial molds using an off-the-shelf water-soluble resin and a low-cost desktop 3D printer. This enables us to recreate parts of the cerebral arterial tree as a full-scale phantom model ([Formula: see text] cm) in transparent silicone rubber (polydimethylsiloxane, PDMS) from computed tomography angiography images (CTA). We analyzed the model with magnetic resonance imaging (MRI) and compared it with the patient data. The results show good agreement and smooth surfaces for the arteries. We also evaluate our method by looking at its capability to reproduce 1 mm channels and sharp corners. We found that round shapes are well reproduced, whereas sharp features show some divergence. Our method can fabricate a patient-specific phantom model with less than 2 h of total labor time and at a low fabrication cost.
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Affiliation(s)
| | - Madelene Holmgren
- Department of Radiation Sciences, Radiation Physics, Biomedical Engineering, Umeå University, 901 87, Umeå, Sweden
- Department of Clinical Science, Neurosciences, Umeå University, 901 87, Umeå, Sweden
| | - Petter Holmlund
- Department of Radiation Sciences, Radiation Physics, Biomedical Engineering, Umeå University, 901 87, Umeå, Sweden
| | - Anders Wåhlin
- Department of Radiation Sciences, Radiation Physics, Biomedical Engineering, Umeå University, 901 87, Umeå, Sweden
- Department of Applied Physics and Electronics, Umeå University, 901 87, Umeå, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, 901 87, Umeå, Sweden
| | - Anders Eklund
- Department of Radiation Sciences, Radiation Physics, Biomedical Engineering, Umeå University, 901 87, Umeå, Sweden
| | - Tobias Dahlberg
- Department of Physics, Umeå University, 901 87, Umeå, Sweden
| | - Krister Wiklund
- Department of Physics, Umeå University, 901 87, Umeå, Sweden
| | - Magnus Andersson
- Department of Physics, Umeå University, 901 87, Umeå, Sweden.
- Umeå Center for Microbial Research (UCMR), Umeå University, 901 87, Umeå, Sweden.
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