Stent prosthesis on the aorta. Three-dimensional computed tomographic (CT) scan reconstruction of abdominal aortic aneurysm treated with a Stent. An aneurysm is a bulge of a vessel due to the dilatation of its wall. A ruptured aneurysm can be fatal. The treatment includes strenghtening the damaged part of the artery thanks to the reticulated cylindrical structure of a stent (white) introduced during angioplasty.