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Abstract #0079

Complex-Difference Constrained Reconstruction for Accelerated Phase Contrast Flow Imaging

Aiqi Sun 1 , Bo Zhao 2 , Rui Li 1 , and Chun Yuan 1,3

1 Center for Biomedical Imaging Research, School of Medicine, Tsinghua University, Beijing, China, 2 Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States, 3 Department of radiology, University of Washington, WA, United States

Phase-contrast (PC) cine MRI has been demonstrated as a promising technique for studying hemodynamics. However, it remains limited in clinical practice because of its long scan time. To date, a number of fast imaging methods have been applied to PC cine MRI, including kinds of k-t reconstruction algorithms, but most of them could cause temporal blurring and large deviation in flow measurements under higher acceleration rate. In this work, we propose a new complex-difference constrained reconstruction technique based on low-rank and sparsity model, and we further integrate it with ESPIRiT-based parallel imaging reconstruction to achieve even higher acceleration.

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