Alex Frydrychowicz1, Eric Niespodzany2, Scott B. Reeder1, Kevin M. Johnson3, Oliver Wieben2, Christopher J. Franois1
1Department of Radiology, University of Wisconsin - Madison, Madison, WI, USA; 2Departments of Radiology, Medical Physics, University of Wisconsin - Madison, Madison, WI, USA; 3Department of Medical Physics, University of Wisconsin - Madison, Madison, WI, USA
4D velocity mapping is increasingly used for hemodynamic analyses. PC-VIPR is a time-efficient acquisition strategy applying radial undersampling for imaging with high spatial resolution and large volume coverage. The employed 5-point velocity encoding increases the velocity sensitivity spectrum while preserving high VNR at a small scan time penalty, thus enabling simultaneous morphologic and hemodynamic evaluation of large vascular territories. We validated 5-point PC-VIPR for aortic and pulmonary flow measurements in healthy volunteers. Phantom-corrected 2D phase contrast acquisitions and cardiac CINE bSSFP volumetry served as reference standards. Results show good agreement underlining the clinical applicability of 5-point PC-VIPR for flow quantification.