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Abstract #0983

Coil-joint-split N/2 Ghost Correction and Joint L1-SPIRiT for SMS-EPI Reconstruction: Demonstration Using 7T HCP-style Diffusion Acquisition

Ziyi Pan1, Hua Guo1, Erpeng Dai2, Edward J. Auerbach3, Kamil Ugurbil3, and Xiaoping Wu3
1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 2Department of Radiology, Stanford University, Stanford, CA, United States, 3Center for Magnetic Resonance Research, Radiology, Medical School of the University of Minnesota, Minneapolis, MN, United States

Simultaneous Multislice (SMS) has become a major acceleration technique in Human Connectome Project (HCP) to acquire high-resolution diffusion and functional MRI. Conventional reconstruction for SMS-EPI includes using traditional Nyquist ghost correction and slice GRAPPA that usually requires single-band (SB) reference scans. In this work, we introducea a novel reference-less Nyquist ghost correction approach and a new joint L1-spirit reconstruction algorithm without the need of SB reference scans. We evaluated the performance of the proposed method by acquiring 7T HCP-style diffusion and show that the proposed method can effectively suppress the strong residual aliasing/ghosting as observed for when using conventional reconstruction.

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