An MRI 4D flow study.OBJECTIVES
 Pulse wave velocity (PWV) of the aortic arch is usually estimated by using 2D phase contrast in MRI.  Thanks to 4D flow MRI, segmental PWV of the ascending and descending aorta, as well as PWV of the entire thoracic aorta can now be estimated within the same examination.  MRI examinations were performed at 3 Tesla, including 2D PC acquisitions with through-plane velocity encoding and sagittal 4D phase contrast acquisitions covering the thoracic aorta volume.  All MRI-PWVs were correlated with cf-PWV (r = 0.67; r = 0.63: r = 0.47; r = 0.61 for 2D-PWV, 4D-TA-PWV; 4D-AA-PWV, 4D-DA-PWV, respectively, P < 0.001).  Global and segmental PWV analysis of the thoracic aorta can be accurately assessed using 4D flow MRI. 
MRI
Thanks to 4D flow MRI, segmental PWV of the ascending and descending aorta, as well as PWV of the entire thoracic aorta can now be estimated within the same examination.  Global and segmental PWV analysis of the thoracic aorta can be accurately assessed using 4D flow MRI. 
4D flow MRI