Figure 10a. Aortic dissection. (a) Contrast-enhanced axial CT image depicts a dissected aorta with a thrombosed false lumen (large arrow) and a small, enhanced true lumen (small arrow). The thrombosed false lumen compresses the celiac trunk ostium. Note the right kidney infarction due to a thrombosed renal artery (not shown). (b) Curved coronal reformatted image of the descending thoracic aorta depicts the thrombosed false lumen (large arrow) and stenotic true lumen (small arrow).