Figure 3
a, b 1-day-old girl with pulmonary atresia. 3D volume rendered image from posterior (a) and coronal-oblique MIP image viewed from anterior (b) show blood supply to both lungs via direct APCA originating from the descending aorta (a and b, bold black arrow), which anastomoses with the left pulmonary artery at the hilum and supplies confluent hypoplastic pulmonary arteries without a main pulmonary artery (a and b, arrowhead). Blood supply to the left upper lobe derives from another direct APCA (a, thin black arrow) originating from the descending aorta. The left lower lobe is supplied via an indirect APCA deriving from the celiac trunk (b, white arrow).