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Abstract #2787

Optimization of ROI sampling strategies for proton density fat-fraction MRI of hepatic steatosis before liver transplantation in ex vivo

Gen Chen1, Weiyin Vivian Liu2, Hao Tang1, Lifen Zhou1, Daoyu Hu1, and Zhen Li1
1Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China, 2MR Research, GE Healthcare, Beijing, China, Beijing, China

This study aims to determine sampling strategy (SS) with the fewest regions of interest (ROIs) that could diagnose hepatic steatosis (HS) as reliably as the 9-ROI strategy before liver transplantation in ex vivo. All strategies with ≥5 ROIs had an intraclass correlation coefficients(ICC) ≥ 0.995 and limit of agreement (|LOA|)≤ 1.5%. The average proton density fat-fraction (PDFF) was moderately correlated with the histological diagnosis. The 5-ROI SS obtains similar PDFF results as the 9-ROI strategy before liver transplantation in ex vivo. After further verification, this method may become an available standard to assess HS before liver transplantation in ex vivo.

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