Whole-Neck Non-Contrast-Enhanced MR Angiography Using Velocity Selective Magnetization Preparation
- 주제(키워드) non-contrast-enhanced MRA , neck angiography , velocity-selective preparation pulse sequence
- 주제(기타) Radiology, Nuclear Medicine & Medical Imaging
- 설명문(일반) [Park, Chan Joo; Shin, Taehoon] Ewha Womans Univ, Div Mech & Biomed Engn, Seoul 03760, South Korea; [Park, Chan Joo; Shin, Taehoon] Ewha Womans Univ, Grad Program Smart Factory, Seoul 03760, South Korea; [Choi, Seung Hong] Seoul Natl Univ, Coll Med, Seoul Natl Univ Hosp, Dept Radiol, Seoul 03080, South Korea; [Park, Jaeseok] Sungkyunkwan Univ, Dept Biomed Engn, Suwon 16419, South Korea; [Park, Jaeseok] Sungkyunkwan Univ, Dept Intelligent Precis Healthcare Convergence, Suwon 16419, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 MDPI
- 발행년도 2023
- URI http://www.dcollection.net/handler/ewha/000000204224
- 본문언어 영어
- Published As https://doi.org/10.3390/tomography9010006
초록/요약
This study aimed to optimize velocity-selective magnetic resonance angiography (VS-MRA) protocols for whole-neck angiography and demonstrate its feasibility in healthy subjects with comparisons to clinical 3D time-of-flight (TOF) angiography. To help optimize VS-MRA protocols, 2D phase-contrast (PC) flow imaging and 3D B-0 and B-1 field mappings were performed on five healthy volunteers. Based on these measurements, a slab-selective (SS) inversion preparation was applied prior to a VS saturation preparation to further suppress venous blood, while the VS preparation pulse was designed with compensation for field offsets. VS-MRA and 3D TOF were performed on six healthy subjects, and relative contrast ratios (CRs) between artery and muscle signals were calculated for twenty arterial regions for comparisons. The pre-compensated VS pulse improved the visualization of the subclavian arteries and suppression of background tissues, which involved large B-0 and B-1 field errors. The combination of SS and VS preparations effectively suppressed venous blood. While the relative CR values were 0.78 +/- 0.08 and 0.72 +/- 0.10 for VS-MRA and 3D TOF, respectively, over the twenty segments, VS-MRA outperformed 3D TOF in visualizing arterial segments of a small size or with a horizontal orientation, such as subclavian, facial, and occipital arteries. The proposed neck VS-MRA with the field-error-compensated VS preparation combined with the SS preparation is feasible and superior to 3D TOF in visualizing small and/or horizontally oriented arterial segments.
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