Abstract #1153

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

Yilong Liu^1,2, Kun Zhou³, Dehe Weng³, Hua Guo⁴, and Ed X. Wu^1,2

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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