Figure 1
A) Example of left ventricular outflow tract (LVOT) segmentation on a velocity PC MR image, flow rate curve, whose integral corresponds to LVOT stroke volume (LVOT SV) and whose peak corresponds to Q LVOT Q; B) Example of aortic flow segmentation on a velocity PC MR image, transaortic maximal velocity curve, whose integral corresponds to VTIAO and whose peak corresponds to VmaxAO. AVA2 is the ratio between the two integrals. AVA3 is the ratio between the two peaks.