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Abstract #3447

Improved Multi-band Multi-shot Diffusion MRI Reconstruction with Joint Usage of Structured Low-rank Constraints and Explicit Phase Mapping 

Erpeng Dai1, Merry Mani 2, and Jennifer A McNab1
1Departmnet of Radiology, Stanford University, Stanford, CA, United States, 2Departmnet of Radiology, University of Iowa, Iowa City, IA, United States


Inter-shot phase correction is a critical step in multi-band multi-shot diffusion MRI. The phase correction can be accomplished by first estimating the explicit phase map and then inputting it into the diffusion signal formulation model to recover the diffusion images. Alternatively, the phase information can be used in an indirect manner to determine structured low rank constraints in k-space. The two methods differ in terms of reconstruction accuracy and efficiency. In this study, we propose a new way to combine the two approaches for improved image quality, termed “Joint Usage of structured Low-rank constraints and Explicit Phase mapping” (JULEP).

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