FIG 5. CT angiographic source images of aneurysm treated with stents and stent-grafts show differences in artifacts produced by different device compositions.

A, Animal 1. Right (lower aneurysm), stainless steel stent partially herniating into an experimental aneurysm (arrowhead). Left, PTFE/nitinol stent-graft (arrow). The apparent wall thickness of the stainless steel stent on CT is greater than that of the stent-graft because of the high attenuation of the former.

B, Animal 2. Right (lower aneurysm), stainless steel stent (arrowhead). Left, nitinol stent (arrow). The apparent wall thickness of the nitinol stent on CT is less than the stainless steel stent and the PTFE/nitinol stent-graft.