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Abstract #0242

Self-Calibrating Aliasing-Controlled Simultaneous Multi-Slice MR Image Reconstruction from Generalized 3D Fourier Encoding Perspective

Eun Ji Lim1, Chul-Ho Sohn2, Taehoon Shin3, and Jaeseok Park1,4
1Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of, 2Department of Radiology, Seoul National University Hospital, Seoul, Korea, Republic of, 3Division of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul, Korea, Republic of, 4Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University, Suwon, Korea, Republic of


To jointly resolve inter-slice leakages and in-plane aliasing in undersampled SMS imaging, we proposed a novel, one-step solution for SMS-reconstruction optimally exploiting variable-density(VD) sampling from generalized 3D Fourier encoding perspective. Extended controlled aliasing is performed by upsampling VD sampled data in the kz-direction. A slice-specific null space operator is learned using extended self-calibration including CAIPI slices and in-plane images. Aliasing artifacts are jointly resolved in ky-and kz-directions by balancing null space consistency with a low rank prior while enforcing slice-specific VD-sampled data in 3D k-space. We demonstrated the proposed method outperforms competing methods at SMS=3,R=2 in head and knee.

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