Figure 7. Pulmonary atresia and ventricular septal defect in an 8-year-old girl with tetralogy of Fallot anomaly. (a) Axial CT image, (b) axial and (c) sagittal volume-rendered 3D reformations show aplasia of the main pulmonary artery (*). Non-confluent right (RPA) and left (LPA) pulmonary arteries filling by collateral arteries are seen. Ascending aorta (AA) is dilated. (d) Axial volume-rendered 3D reformation at the level of the ventricular system also shows ventricular septal defect (arrow). DA, descending aorta.