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Abstract #3204

Joint Estimation Based Phase Error Correction in Multi-Shot Spiral Diffusion Weighted Imaging

Pan Su1, Xiaodong Ma2, Wenchuan Wu2, Hua Guo2

1School of Electronic and Information Engineering, Beihang University, Beijing, China; 2Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China

Phase inconsistencies among different shots in multi-shot diffusion imaging causes artifacts in final images. Oversampling in k-space center is thus required to remove these errors, however, it inevitably lengthens the readout window and introduces further blurring artifacts. In this study, a new method is proposed to estimate object function and motion-induced phase map in muti-shot spiral DWI jointly, and is validated by the simulation results. Our proof-of-concept work demonstrates that this method estimates the desired artifact-free image more accurately than self-navigator based technique when navigator information is limited, which has potential utilization in high resolution diffusion imaging.