Keywords: Vessels, Velocity & Flow, Aortic Dissection, 4D FlowWe investigated whether changes in 4D flow-derived hemodynamic parameters stratified type B aortic dissection patients and sought to validate a 4D flow-derived 2D planar false lumen flow method. Patient scans with baseline and follow-up 4D flow at least 120 days apart were manually segmented into true and false lumens. Voxel-wise parametric maps and 2D forward and reverse flow in the descending aorta were calculated. Changes in voxel-wise hemodynamic parameters significantly correlated with aortic growth rate, with changes in false lumen reverse flow as the most robust parameter. 2D planar flow correlated with voxel-wise flow, but not aortic growth.
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