Axial maximum intensity projection CT angiography image showing coronary abnormality in a TGA patient after ASO. The LM is seen arising from the right coronary cusp of the neo-aortic root and divides into left anterior descending and LCx after a short retro-aortic course.Ao: neo-aortic root, ASO: arterial switch operation, LAD: left anterior descending artery, LCx: left circumflex artery, LM: left main trunk, TGA: transposition of the great arteries.