Chinese Journal of Magnetic Resonance >
The Impact of K-Space Filling Strategy on Fat Artifacts in APT Imaging Based on FLASH Sequence
Received date: 2024-04-26
Online published: 2024-05-29
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.
PANG Qifan , WANG Zhichao , WU Yupeng , LI Jianqi . The Impact of K-Space Filling Strategy on Fat Artifacts in APT Imaging Based on FLASH Sequence[J]. Chinese Journal of Magnetic Resonance, 2024 , 41(4) : 443 -453 . DOI: 10.11938/cjmr20243113
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