Abstract #4694

Simultaneous Multi-slab DWI Reconstruction with Intrinsic Distortion Correction using Blip-up/down Acquisitions

Jieying Zhang¹, Simin Liu¹, Erpeng Dai², Xinyu Ye¹, Yang Yu^3,4, Yajing Zhang⁵, Jie Lu^3,4, and Hua Guo¹

¹Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, ²Department of Radiology, Stanford, CA, United States, ³Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China, ⁴Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, China, ⁵MR Clinical Science, Philips Healthcare, Suzhou, China

Synopsis

Simultaneous multi-slab imaging (SMSlab) can achieve high-resolution DWI with high SNR efficiency, but image distortions remain a problem. Joint reconstruction of blip-up/down EPI data can correct for distortion and reduce g-factors simultaneously. This study proposed a joint reconstruction framework with intrinsic distortion correction for SMSlab. Three sampling patterns were compared in terms of levels of distortions and g-factors. According to the results, a multi-shot acquisition should be used to reduce the distortion. Combined with the controlled aliasing in parallel imaging (CAIPI) sampling pattern, it can further reduce the g-factors.

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