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Abstract #3331

Multi-shot Diffusion Imaging using 1D Navigator Acquisition with Parallel Imaging and Iterative Reconstruction

Zhe Zhang1, Xiaodong Ma1, Erpeng Dai1, and Hua Guo1

1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, People's Republic of China

Multi-shot EPI can achieve high resolution diffusion imaging but shot-to-shot phase variation correction is indispensable. Previous multi-shot EPI diffusion imaging methods can be categorized into two groups based on different phase navigation strategies: navigator acquired from a second echo and navigator calculated from image-echo itself using parallel imaging technique. These methods may suffer prolonged scan time or limitation from high reduction factor penalty. In this work, we proposed a new strategy for efficient navigating in multi-shot DWI using 1D navigator acquisition with parallel imaging and iterative reconstruction. Results show the proposed methods can effectively correct the motion-induced artifacts in diffusion imaging.

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