In vitro image characteristics of an abdominal aortic stent graft: CTA versus 3D MRA.

摘要: Percutaneous stent-grafting is increasingly employed as a less invasive alternative to surgery for the treatment of infrarenal abdominal aortic aneurysms. It requires long-term imaging follow-up, document structural integrity device, exclude perigraft channels and endograft leakages, well shrinkage aneurysmal sac. The expectation severe stent induced artifacts safety concerns have prevented 3D MRA from being used. purpose this in vitro study was investigate characteristics bifurcated graft with (3D Fourier transform fast spoiled GRE) at 1.5 T comparison those CTA. Measurement wall thickness luminal diameter were made on agar gel embedded five locations both CTA images. depicted dark ring MR Wall measurements overestimated true thickness, while diameters slightly underestimated. differences between CT not statistically significant (P = 0.67; P 0.85). Artifacts emanating platinum markers considerably MR-images. A wider area signal loss seen only insertion iliac leg into portion due overlap two radio-opaque markers. images should permit comprehensive assessment arterial lumen, perivascular tissues.