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Abstract #0690

Water/fat separation for distortion-free EPI with point spread function encoding

Zhangxuan Hu1, Yishi Wang1,2, Zijing Dong1, and Hua Guo1

1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 2Philips Healthcare, Beijing, China

Effective removal of chemical-shift artifacts in EPI is a challenging problem especially with severe field inhomogeneity. In this study, water/fat separation thus fat suppression is achieved using the intrinsic signals of point spread function (PSF) encoded EPI (PSF-EPI), in which chemical-shift encoding is realized in the intermediate images with different time shifts. The results from three imaging regions show that this PSF-EPI based method can separate water/fat robustly. Thus fat signals can be effectively removed from EPI even with severe field inhomogeneity.

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