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Fig. 3D —45-year-old man with patent ductus arteriosus. (Courtesy of Dr. Yeon Hyeon Choe, Seoul, Korea) Coronal reconstruction shows patent ductus arteriosus (white straight arrow) and pulmonary artery aneurysm (curved arrow). Calcification is absent at communication (black arrow) of aneurysmal sac and main pulmonary artery (MPA).