Fig. 12From: Society for Cardiovascular Magnetic Resonance/European Society of Cardiovascular Imaging/American Society of Echocardiography/Society for Pediatric Radiology/North American Society for Cardiovascular Imaging Guidelines for the use of cardiovascular magnetic resonance in pediatric congenital and acquired heart diseaseGeometry of the pulmonary bifurcation after Lecompte maneuver. (A). Volume rendered 3D reconstruction showing that the pulmonary side branches runs around the aortic root. An external impression on the proximal course of the pulmonary arteries can occur. (B) Coronal view of the geometric relation between ascending aorta and pulmonary arteries (RPA **, LPA *). Note the oval shape of the pulmonary arteries, with the broader diameter in the cranio-caudal direction and slimmer diameter in the lateral direction. Ao  ascending aorta, LPA  left pulmonary artery, RPA right pulmonary arteryBack to article page