Abstract #3020

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

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

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

Multi-shot EPI can achieve high resolution diffusion imaging, but the ghost artifacts caused by shot-to-shot phase variations must be corrected. In recent works, k-space phase correction methods have been proposed, which require navigator acquisitions for each excitation for calibrating the k-space interpolation parameters. In this work, a self-calibrated method for multi-shot DWI correction in k-space is proposed, which does not require navigator acquisitions for efficient scanning and does not suffer from the potential mismatch between image and navigator echoes. Experiments on liver DWI demonstrate that the proposed method can correct the motion induced artifacts in diffusion imaging.

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