Figure 6b. Draped aorta sign in a 55-year-old man with a known abdominal aortic aneurysm and recent vague back pain. Axial CT angiographic images (a at a level higher than b) depict an 8-cm abdominal aortic aneurysm with a posterior aortic wall that follows the contour of the vertebral bodies with a draping effect (arrow in b). The latter finding is indicative of a contained rupture.