Axial maximum intensity projection CT angiography image showing abnormal great vessel configuration in TGA patient after ASO. The pulmonary artery is directly placed anteriorly over the aorta, leading to the compression of the left coronary artery at the origin.Ao: neo-aorta root, ASO: arterial switch operation, CT: computed tomography, LM: left main coronary artery, PA: pulmonary artery, TGA: transposition of the great arteries.