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Figure 4b. Dissecting aortic aneurysm in a 60-year-old man who previously underwent repair of the ascending aorta and aortic arch for acute aortic dissection. (a) Three-dimensional volume-rendered image from CT angiography (left anterior oblique view) shows a dissecting aneurysm of the thoracoabdominal aorta. (b) Axial CT image obtained at the level of the 10th thoracic vertebra (Th10) shows a small true lumen and a large false lumen. (c, d) CPR images from MR angiography (c) and CT angiography (d) show continuity of the aorta; left 10th intercostal artery (large black arrow); radiculomedullary artery (black arrowhead); artery of Adamkiewicz (white arrow in c, small black arrow in d); and anterior spinal artery (white arrowhead). The 10th intercostal artery originates from the false lumen (F). The image from CT angiography shows poor opacification of the artery of Adamkiewicz (small black arrow in d). T = true lumen, T10 = 10th thoracic vertebra.
