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Abstract #3336

Improved Navigator-free Multi-shot DTI Reconstruction with Inter-image Correlation Constraint

Xiaodong Ma1, Zhe Zhang1, Erpeng Dai1, Chun Yuan1,2, and Hua Guo1

1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, Beijing, People's Republic of China, 2Vascular Imaging Laboratory, Department of Radiology, University of Washington, Seattle, WA, United States

To improve the image quality for navigator-free multi-shot DTI reconstruction, the inter-image correlation constraint is introduced. Group sparsity and anisotropic sparsity are proposed as two specific implementations, using the POCS-ICE algorithm. Results show that both constraints can improve the image quality with increased SNR. In addition, anisotropy sparsity has less blurring and can better maintain the detailed structures.

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