IRIS corrects the motion-induced inter-shot phase errors for multi-shot diffusion-weighted imaging by extracting the phase information from an additional navigator data, which may cause the distortion mismatch between the image and navigator data. To solve the distortion mismatch issue in IRIS without using B0 field map, we propose to extract the coil sensitivities and phase information from navigator data by using an eigen-analysis scheme. The performance of the proposed method is demonstrated in both phantom and in vivo data sets.
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