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.