Fig. 1From: Quantification of aortic stenosis diagnostic parameters: comparison of fast 3 direction and 1 direction phase contrast CMR and transthoracic echocardiographyIllustration of the advantage of 3Dir over 1Dir PC-CMR. While 1Dir PC-CMR only computes velocity in one direction (Z), 3Dir PC-CMR simultaneously computes velocities in 3 directions (X, Y, and Z)Back to article page