Fig. 1

CT images of a 10-year-old man with coarctation of the aorta. a Axial image shows the significant stenosis of aortic isthmus (white arrow). b Sagittal multiplanar reformatted image shows the measurement of aortic diameters at different levels: 1, ascending aorta; 2, pre-coarctation aorta; 3, aortic arch; 4, site of coarctation; 5, descending aorta after the site of coarctation; 6, descending aorta at level of diaphragm. c Volume rendering image shows a short segment aortic narrowing (white arrow) below the left subclavian artery