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Abstract #4216

An efficient eddy current correction method for fat quantification by bipolar readout sequence

Chao Zou1, Chuanli Cheng1,2, Yangzi Qiao1, Hao Peng1, Changjun Tie1, Qian Wan1, Xin Liu1, Hairong Zheng1, and Min Pan1,3

1Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, CAS, Shenzhen, China, 2University of Chinese Academy of Sciences, Beijing, China, 3Shenzhen Hospital of Guangzhou University of Traditional Chinese Medicine, Shenzhen, China

Multi-echo GRE sequence with bipolar readout gradients can reduce the achievable echo spacing compared to unipolar readout gradients for fat fraction (FF) quantification, and has higher acquisition efficiency. The eddy current induced phase (EC-phase) in bipolar sequence corrupts the phase consistency between the echoes, making it one of the confounding factors for the accurate fat quantification. In this study, we proposed an accurate EC-phase estimation method in bipolar acquisition sequence for FF quantification. The proposed method is validated through comparing the FF quantification from the EC-phase corrected bipolar data to the well-established unipolar acquisition through phantom experiments.

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