Fig. 5

Measurement of the distances from the pulmonary vein (PV) orifices to the contact point between the PV and the pulmonary artery (PA). a–d Distances from the right superior, left superior, right inferior, and left inferior PV orifices to the contact points between the corresponding PV and PA, respectively. The left panel shows the images at the contact point level, and the right panel shows the distances between the contact points and the PV orifice. The black dot represents the contact point, the white line represents the cross-section of the PV orifice, and the black line represents the distances between the contact point and the PV orifice. AO, aorta; LV, left ventricle; LA, left atrium; LPA, left PA; RPA, right PA; RSPV, right superior PV; RIPV, right inferior PV; LSPV, left superior PV; LIPV, left inferior PV