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Vascular and Interventional Radiology |
1 From the Department of Radiology, Stanford University School of Medicine, Stanford University Medical Center, Rm S-072B, Stanford, CA 94305-5105. From the 1997 RSNA scientific assembly. Received December 16, 1998; revision requested February 11, 1999; final revision received August 3; accepted August 5. Address reprint requests to G.D.R. (e-mail: grubin@stanford.edu).
PURPOSE: To compare computed tomographic (CT) angiography and conventional angiography for determining the success of endoluminal stent-graft treatment of aortic aneurysms.
MATERIALS AND METHODS: Forty patients underwent conventional angiography and CT angiography following treatment of aortoiliac aneurysms with endoluminal stent-grafts. Six additional sets of conventional angiographic–CT angiographic examinations were performed in five patients after placement of additional stent-grafts or coil embolization to treat perigraft leakage. Three faculty CT radiologists who were blinded to patient clinical data and outcome independently interpreted the CT angiograms, and three faculty angiographers, who were not involved in the stent-graft deployment, interpreted the conventional angiograms. Images were assessed for the presence of postdeployment complications. A reference standard was developed by experienced radiologists using all available images and clinical data. Sensitivities, specificities, and 
values were calculated.
RESULTS: Perigraft leakage was the most commonly identified complication. Twenty perigraft leaks were detected in the results of 46 examinations. Sensitivities and specificities for detecting perigraft leakage were 63% and 77% for conventional angiography and 92% and 90% for CT angiography, respectively. The value was 0.41 for conventional angiography and 0.81 for CT angiography.
CONCLUSION: CT angiography is the preferred method for establishing the presence of perigraft leakage following treatment of aortoiliac aneurysms with stent-grafts.
Index terms: Aneurysm, aortic, 94.73, 981.73 • Aneurysm, CT, 94.12916, 981.12916 • Angiography, comparative studies, 94.1211, 981.1211 • Computed tomography (CT), angiography, 94.12916, 981.12916 • Computed tomography (CT), comparative studies, 94.12916, 981.12916 • Interventional procedures, complications, 94.458, 981.458 • Stents and prostheses, 94.456, 981.456
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