波谱学杂志2024，Vol.41Issue(4)：443-453,11.DOI:10.11938/cjmr20243113
K空间填充策略对基于FLASH序列的APT图像脂肪伪影的影响
The Impact of K-Space Filling Strategy on Fat Artifacts in APT Imaging Based on FLASH Sequence
摘要
Abstract
In chemical exchange saturation transfer(CEST)imaging,the relaxation recovery of longitudinal magnetization during the signal acquisition process results in a decrease in CEST contrast.Consequently,the CEST saturation mode and the corresponding K-space filling method significantly influence both the image quality and quantitative results of CEST.In this paper,simulations and human experiments were conducted to examine the impact of various K-space filling strategies within the fast low angle shot(FLASH)sequence on the quality of brain amide proton transfer(APT)images and on the quantitative analysis of magnetization transfer ratio asymmetry(MTRasym).The result indicates that employing segmented saturation techniques with optimized reordered center-out K-space filling technology can effectively mitigate artifacts caused by scalp fat and enhance the accuracy of MTRasym values.关键词
磁共振成像(MRI)/化学交换饱和转移(CEST)/脂肪伪影/分段采集/K空间重排Key words
magnetic resonance imaging(MRI)/chemical exchange saturation transfer(CEST)/fat artifact/segmented acquisition/K-space reordering分类
数理科学引用本文复制引用
逄奇凡,王志超,武玉朋,李建奇..K空间填充策略对基于FLASH序列的APT图像脂肪伪影的影响[J].波谱学杂志,2024,41(4):443-453,11.基金项目
华东师范大学"幸福之花"基金资助项目. （）
