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Abstract #3939

Image-Based Non-Rigid Motion Correction for Free-breathing 3D Abdominal MRI

Jun Lv1, Ming Yang2, Jue Zhang1,3, Xiaoying Wang1,4, and Jing Fang1,3

1Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, People's Republic of China, 2Philips Healthcare, Suzhou, People's Republic of China, 3College of Engineering, Peking University, Beijing, People's Republic of China, 4Department of Radiology, Peking University First Hospital, Beijing, People's Republic of China

Free breathing abdomen imaging requires non-rigid motion registration of the unavoidable respiratory motion in the 3D under-sampled datasets. In this work, pyramidal Lucas-Kanade based optical flow estimation is proposed to perform upper abdomen registration, which enables reconstruction of motion-free abdominal images throughout the respiratory cycle. Preliminary results on images acquired using 3D golden radial phase encoding eThrive scan demonstrate that our approach makes vessels in liver sharper and more consecutive when compared to traditional NMC and LREG based methods.

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