Figure 4. On the left, postprocessing of phase contrast images on the aorta to obtain aortic stroke volume (aortic SV) thougthout the cardiac cycle.

On the right, postprocessing of SSFP images to obtain left ventricle stroke volume (LV SV) after manual tracing of end-diastolic and end-systolic contours. Mitral regurgitation fraction is calculated as: (LV SV − aortic SV / LV SV) × 100. Ao: aorta.