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Abstract #0980

Phase-matched Self-calibrated K-space Phase Correction Method for Multi-shot Diffusion Imaging

Zhe Zhang1, Xiaodong Ma2, Lanxin Ji1, Jing Jing1, Wanlin Zhu1, Zhangxuan Hu3, Yishi Wang4, Hua Guo3, and Yongjun Wang1,5
1China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijng, China, 2Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, 3Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 4Philips Healthcare, Beijing, China, 5Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China

Multi-shot acquisition enables high-resolution diffusion imaging, but the artifacts caused by shot-to-shot phase variation must be corrected. Self-calibrated multi-shot DWI methods utilize parallel imaging reconstruction to solve the phase of each shot. Previously reported self-calibrated GRAPPA with a compact kernel (SC-ckGRAPPA) method is compromised by the high reduction factor when recovering the navigator information. In this work, PM-SC-ckGRAPPA was introduced with the phase-matched reconstruction, and evaluated via in-vivo experiment. Results show that PM-SC-ckGRAPPA provides improved reconstruction compared with conventional approaches, and PM-SC-ckGRAPPA can be a potential tool for high-resolution diffusion imaging.

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