Non-contrast-enhanced abdominal MRA at 3 T using velocity-selective pulse trains
- 주제(키워드) abdominal MRA , arteriography , non-contrast-enhanced MRA , velocity-selective pulse train
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- OA유형 Green Accepted
- 발행기관 John Wiley and Sons Inc.
- 발행년도 2020
- URI http://www.dcollection.net/handler/ewha/000000169600
- 본문언어 영어
- Published As https://dx.doi.org/10.1002/mrm.28187
- PubMed https://pubmed.ncbi.nlm.nih.gov/32017173
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Purpose: Most existing non-contrast-enhanced methods for abdominal MR arteriography rely on a spatially selective inversion (SSI) pulse with a delay to null both static tissue and venous blood, and are limited to small spatial coverage due to the sensitivity to slow arterial inflow. Velocity-selective inversion (VSI) based approach has been shown to preserve the arterial blood inside the imaging volume at 1.5 T. Recently, velocity-selective saturation (VSS) pulse trains were applied to suppress the static tissue and have been combined with SSI pulses for cerebral MR arteriography at 3 T. The aim of this study is to construct an abdominal MRA protocol with large spatial coverage at 3 T using advanced velocity-selective pulse trains. Methods: Multiple velocity-selective MRA protocols with different sequence modules and 3D acquisition methods were evaluated. Sequences using VSS only as well as SSI+VSS and VSI+VSS preparations were then compared among a group of healthy young and middle-aged volunteers. Using MRA without any preparations as reference, relative signal ratios and relative contrast ratios of different vascular segments were quantitatively analyzed. Results: Both SSI+VSS and VSI+VSS arteriograms achieved high artery-to-tissue and artery-to-vein relative contrast ratios above aortic bifurcation. The SSI+VSS sequence yielded lower signal at the bilateral iliac arteries than VSI+VSS, reflecting the benefit of the VSI preparation for imaging the distal branches. Conclusion: The feasibility of noncontrast 3D MR abdominal arteriography was demonstrated on healthy volunteers using a combination of VSS pulse trains and SSI or VSI pulse. © 2020 International Society for Magnetic Resonance in Medicine
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