Validation of 4D velocity mapping using 5-point PC-VIPR for blood flow quantification in the thoracic aorta and main pulmonary artery

摘要: 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.