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Abstract #1355

Improved L1-SPIRiT Reconstruction with a Phase Divergence Penalty for 3D Phase-Contrast Flow Measurements

Michael Loecher1, Claudio Santelli2, 3, Oliver Wieben1, 4, Sebastian Kozerke2, 3

1Medical Physics, University of Wisconsin Madison, Madison, WI, United States; 2Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland; 3Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom; 4Radiology, University of Wisconsin Madison, Madison, WI, United States

A phase divergence penalty is proposed to improve velocity vector field reconstructions from undersampled 3D phase-contrast flow measurements. The method referred to as L1-SPIRiTphase is tested using a digital flow phantom and data acquired in the aortic arch in-vivo. Significant improvements in reconstruction accuracy of 4-fold undersampled data are demonstrated when compared to conventional L1-SPIRiT reconstructions.