ISMRM22 - Vascular Imaging: Angiography

Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting • 07-12 May 2022 • London, UK

Vascular Imaging: Angiography

Digital Poster

Cardiovascular

Tuesday, 10 May 2022

Exhibition Hall:S8 & S9

17:45 - 18:45

Session Number: D-115

Module : Module 2: Cerebrovascular, Stroke, Ischemia, Atherosclerosis

	Computer #
1833	13	A1-diameter asymmetry of the Circle of Willis induces blood-flow changes directed towards the anterior communicating artery View the Presentation Rick J. van Tuijl¹, Maud E.H. Ophelders¹, Ynte M. Ruigrok², Iris N. Vos¹, Irene C. van der Schaaf¹, Jaco J.M. Zwanenburg¹, and Birgitta K Velthuis¹ ¹Radiology, UMC Utrecht, Utrecht, Netherlands, ²Neurology, UMC Utrecht, Utrecht, Netherlands Asymmetry in diameter of the pre-communicating part (A1-segment) of both anterior cerebral arteries is common and is related to anterior communicating artery aneurysm formation. We used TOF-MRA and 4D phase-contrast 3T-MRI in 122 subjects without intracranial aneurysms, and found that blood-flow asymmetry between A1-segments increased linearly with increasing A1 diameter asymmetry. Asymmetry of >30% in A1-segment diameters resulted in statistical significant blood-flow differences compared to persons with symmetric A1-segments. Whether this >30% A1-diameter asymmetry is a good cut-off to define a risk factor for anterior communicating artery aneurysm formation requires further research.
1834	14	Non-Contrast-Enhanced Whole Neck MR Angiography using Velocity Selective Saturation and Slab Selective Inversion View the Presentation Chanjoo Park¹, Zungho Zun², Jaeseok Park³, Seung Hong Choi⁴, and Taehoon Shin^1,5,6 ¹Division of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul, Korea, Republic of, ²Department of Radiology, Weill Cornell Medicine, New York, NY, United States, ³Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of, ⁴Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea, Republic of, ⁵Graduate Program in Smart Factory, Ewha Womans University, Seoul, Korea, Republic of, ⁶Department of Medicine, Case Western Reserve University, Cleveland, OH, United States Velocity-selective (VS) MRA is a promising non-contrast-enhanced angiography method allowing for high 3D spatial resolution and high angiographic contrast. This study proposes a VS-MRA protocol which includes field error compensation and slab-selective inversion for improved visualization of neck arteries. Initial in-vivo test shows that the proposed VS-MRA better depicts small vessels (such as facial and occipital arteries) and yields higher contrast enhancement ratio than clinical 3D TOF.
1835	15	MRI Measures of Non-atherosclerotic Brain Arterial Remodeling in a Population-based Study View the Presentation Xinwei Zhou¹, Melissa Caughey², Arther Du³, Shang Zhou¹, Yi-Pei Liu¹, Shatorupa Ghosh², Bruce Wasserman ^1,4, and Ye Qiao¹ ¹Radiology, Johns Hopkins University, Baltimore, MD, United States, ²Joint Department of Biomedical Engineering, University of North Carolina & North Carolina State University, Raleigh, NC, United States, ³Gilman School, Baltimore, MD, United States, ⁴Radiology, University of Maryland School of Medicine, Balitimore, MD, United States We have reported reliable MRI measures of non-atherosclerotic brain arterial remodeling (NABAR), as assessed by outward and tortuous remodeling of the large intracranial arteries in older individuals. This will allow us to elucidate the predictors of prevalent and progressing NABAR, and its correlations with brain hypoperfusion and cognition function in an older community-based population.