Figure 1.

Double-oblique gradient-echo phase-contrast CMR (repetition time ms/echo time msec 11/4.8; flip angle 25 deg; section thickness, 6 mm; matrix, 140 × 256), perpendicular to pulmonary trunk. Region of interest (ROI) placement is shown for measuring pulmonary artery (PA) flow. In (a) magnitude and (b) velocity image is shown. The images correspond to the time frame when maximum flow is measured in the PA. ROI placement for the corresponding phantom magnitude (c) and velocity (d) image is shown to correct velocity offset error in PA.