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Abstract #3347

A new method for the image reconstruction of multi-shot navigator-free DWI

Zhangxuan Hu1, Chun Yuan1,2, and Hua Guo1

1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, People's Republic of China, 2Department of Radiology, University of Washington, 1959 NE Pacific Street, SS-202, Seattle, WA 98195-7117, USA, WA, United States

Multi-shot techniques can help to achieve high spatial resolution in diffusion imaging. Due to the application of diffusion gradients, phase errors are induced by shot-to-shot motions, which need to be corrected during image reconstruction. Some phase correction approaches have been proposed, such as SENSE+CG, POCS-ICE, and PR-SENSE. Compressed sensing (CS) method has been used in image reconstruction and shows great insensitivity to noise, and can be effectively solved by the Alternating Direction Method of Multipliers (ADMM) algorithm. In this work, the ADMM method of CS reconstruction is used in multi-shot diffusion imaging and proved that it can provide higher reconstruction quality.

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