Radiology, Vol 198, 443-448, Copyright © 1996 by Radiological Society of North America

ARTICLES

Supra- and juxtarenal aneurysms of the abdominal aorta: preoperative assessment with thin-section spiral CT

L Van Hoe, AL Baert, S Gryspeerdt, G Marchal, H Lacroix, G Wilms and L Mertens
Department of Radiology, University Hospitals, Katholieke Universiteit, Leuven, Belgium.

PURPOSE: To assess the contribution of thin-section spiral computed tomography (CT) to the preoperative radiologic evaluation of juxta- and suprarenal abdominal aortic aneurysms. MATERIALS AND METHODS: Thirty- eight patients (26 men, 12 women; age range, 60-81 years) with infrarenal (n = 23), juxtarenal (n = 8), and suprarenal (n = 7) aneurysms underwent digital subtraction angiography (DSA) and 2-mm- collimation spiral CT. Cine-interactive display of overlapping axial, reformatted, and maximum intensity projection images were used for CT image analysis. CT findings were compared with angiographic and surgical findings. RESULTS: The proximal extent of the juxta- and suprarenal aneurysms (n = 15) could be correctly predicted in 12 cases (80%) with DSA and was exactly determined in 14 (93%) with CT. All renal arteries except three accessory renal arteries were correctly depicted with spiral CT (83 of 86 [96%]). With DSA as the standard of reference, renal artery stenoses of at least 70% were accurately assessed in 95% of cases. CONCLUSION: Thin-section spiral CT can provide additional information in the preoperative diagnosis of juxta- and suprarenal aneurysms.

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