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Abstract #1153

Calibrationless Parallel Imaging Reconstruction for Simultaneous Multi-slice PROPELLER of Upper Abdomen

Yilong Liu1,2, Kun Zhou3, Dehe Weng3, Hua Guo4, and Ed X. Wu1,2
1Laboratory of Biomedical Imaging and Signal Processing, The University of Hong Kong, Hong Kong, China, 2Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China, 3Siemens Shenzhen Magnetic Resonance Ltd, Shenzhen, China, 4Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University, Beijing, China

This study presents a calibrationless parallel imaging (CPI) reconstruction for simultaneous multi-slice (SMS) PROPELLER MRI of the upper abdomen. With simultaneously excited slices having different blipped-CAIPI shifts, the inherent incoherency of SMS PROPELLER data enables CPI reconstruction via low rank matrix approximation. The proposed method was evaluated with both simulated phantom and acquired abdominal MR data. Compared to conventional split slice-GRAPPA, the proposed method jointly reconstructs all blades, providing significantly improved SNR and reduced artifact level.

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