Abstract #3336

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

Xiaodong Ma¹, Zhe Zhang¹, Erpeng Dai¹, Chun Yuan^1,2, 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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