Evaluation of atherosclerotic renal artery stenosis by multi-slice CT angiography

Objective To study the reliability and necessity of multi-spiral computed tomography angiography(MSCTA)for non-invasive examination of patients with atherosclerotic renal artery stenosis (ARAS).

Method Eighty-two ARAS patients who had taken intraarterial digital subtraction angiography were performed with MSCTA.The obtained image data were analyzed in MPR, MIP, VR and SSD with multi-spiral CT at certain condition and were compared with digital substrction angiography(DSA)images.

Results ① MSCTA visualized 95 renal artery stenosis on DSA, 85 of which were detected coordinate(10 were falsepositive cases).The concordance rate of DSA and MSCTA was 89%, and the false positive rate was 6.1%.②The intensity projection reconstruction and volume reconstruction perfectly showed stenosis.

Conclusion MSCTA is helpful to accurately display the renal artery variation and lesions, and is also a reliable and accurate screening modality for the evaluation of patients with ARAS.