Value of arteriography scanning in lower limb artery evaluation: a preliminary study |
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Authors: | Walter F Leyder B Fays J Bronner J Lehalle B Blum A Roland J |
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Institution: | Service d'Imagerie Guilloz, H?pital Central, 29, avenue du Maréchal de Lattre de Tassigny, 54035 Nancy Cedex. f.walter@chu-nancy.fr |
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Abstract: | PURPOSE: The purpose of this study was to assess the feasability of CT Angiography (CTA) with a single row of detectors and to compare it to digital subtraction angiography (DSA) in the evaluation of lower limb peripheral arterial disease. MATERIAL: and methods. A total of 22 patients underwent 24 lower limb Helical CTA using a Somatom Plus 4A (Siemens) and 24 DSA using an Angiostar unit (Siemens). CT angiography was performed in one acquisition (collimation 3mm/ couch motion 9mm/ interval 2mm) with tube rotation time of 0.75 sec from the aortic bifurcation to the calf. DSA was performed after catheterization of a common femoral artery using the Seldinger technique. Arteries were classified in four categories (normal or stenosis<50%, stenosis>50%, occlusion, aneurysm). VRT images and axial source images were assessed by two independent radiologists whereas digital angiographies were read by a vascular radiologist. RESULTS: Global interobserver agreement was good (Kappa=0.71). The degree of agreement between CTA and DSA ranged from low to excellent (0.25 to 0.97) depending on the artery. CONCLUSION: Lower limb CT angiography is a promising non invasive technique. VRT allows quick evaluation. However, is not accurate enough to replace digital angiography. |
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