Evaluation of atherosclerotic renal artery stenosis by spiral CT angiography anddigital subtraction angiography
WANG Jian-jun1, MA Da-qing1, GAO Zong-hui2, ZHANG Bao-feng1, XIAO Guo-wen1, CHEN Guang1
1. Department of Radiology, Beijing Friendship Hospital, Capital University of Medical Sciences, Beijing 100050, China; 2. Department of Radiology, the Fifth Central Hospital of Tianjin, Tianjin 300450, China
Abstract：Objective: To study the reliability and necessity of spiral computed tomography angiography(SCTA) for non-invasive examination of patients with atherosclerotic renal artery stenosis(ARAS). Materials and Methods: Fifty-seven patients with ARAS were performed with SCTA and intraarterial digital subtraction angiography(DSA). The materials were analyzed in MPR, MIP, VR, SSD with spiral CT at certain condition and compared with DSA at last. Results: In all the imaging postprocessing techniques, MIP not only can clearly display the anatomy but display the different configurations. VR can display the artery figures but can not display the information of lumen of blood vessels. They shared all advantages. SCTA visualized 76 renal artery stenosis. On DSA, 66 of these stenosis were detected(10 were false-positive cases). Conclusions: SCTA is helpful to accurately display the renal artery variation and lesions. Both MIP and VR are the best choice to illustrate arterial abnormalities. SCTA is a reliable and accurate screening modality for the evaluation of patients with ARAS.
2008, Vol. 19 
