目的 探讨多排螺旋CT血管成像(MSCT computed tomography angiography,CTA)及数字减影(digital subtraction angiography,DSA)对冠状动脉支架植入术后腔内再狭窄的不同诊断价值。方法 回顾性分析我院31例冠脉支架植入 术后患者的64排冠脉CTA的后处理图像与DSA冠脉造影图像进行比较，观察两者在支架腔内的通畅性、狭窄程度、支 架远端血管的显示情况。结果 经冠脉CTA 发现支架植入术后再狭窄8例，经DSA检查证实支架腔内再狭窄10例。CTA 对支架腔内再狭窄的敏感度为83％，特异度90％，阳性预测值为71％。与DSA比较无统计学差异。结论 MSCT冠脉成 像可获得与DSA相近的检查结果，对了解支架内再狭窄的预测有重要的辅助作用，将二者结合能更加准确的判断和 了解冠脉支架腔内的通畅性与狭窄的程度。

Objective To explore the different diagnostic value of MSCT angiography (computed tomography angiography, CTA) and digital subtraction angiography(DSA) in the patients with restenosis after coronary stent implantation. Methods Retrospective analysis of 31 cases of coronary stent implantation in patients with CTA postprocessing images were compared with DSA images, observate the stent patency, stenosis and distal vascular. Results 8 cases with restenosis after stent implantation were been found by CTA, 10 cases were confirmed by DSA.The sensitivity was 83%, the specificity was 90%, the positive predictive value was 71% of the CTA examination.There was no significant difference between the CTA and DSA. Conclusion MSCT coronary artery imaging can obtain similar results with DSA.It is important to understand the prediction of in-stent restenosis. The combination of the two examination can be accurately determine and understand the patency of coronary stent and the degree of stenosis.