Abdominal Aortic Aneurysm (AAA) removed from a 56 year old male with years of bad habits. This is the distal end (towards the feet). The channel seen in the image is the bifurcation to the left and right iliac arteries.
Volume Rendering of a contrast enhanced thoracoabdominal CT scan. Aortic dissection (Stanford type B) ranging from the aortic arch into the iliac arteries. Stent in the right common/external iliac artery.
Thoracic aortic aneurysms are relatively uncommon compared to abdominal aortic aneurysms. There is a wide range of causes, and the ascending aorta is most commonly affected. CTA and MRA are the modalities of choice to image this condition.