Figure 1

The stack of PC MR images, magnitude images and three directional phase images- AP (anterior to posterior), RL (right to left), and FH (foot to head)- containing the velocity information, u _x (t), u _y (t), u _z (t) , respectively, for the PAs. 24 and 40 phases during the cardiac cycle were recorded per each slice for the control and patient subjects, respectively.