Fig. 5

The 4D surface rendered image of atrioventricular valves obtained from reconstruction of RT 4D volume imaging in a fetus with complete atrioventricular septal defect. The 4D image can clearly show the common atrioventricular valves with five leaflets as a group of petal-like structures (indicated by arrows) during diastole. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle