中文摘要：

目的 探讨双源CT冠状动脉成像（DSCTA）在冠状动脉支架置入术后疗效评价的应用价值.方法 回顾性分析34例行冠状动脉支架置入术后病例的DSCTA资料,运用多种后处理方法显示各支架形态,判断支架内及支架近、远端血管的通畅性,并与冠状动脉造影（CAG）资料对比分析.结果 34例病例72枚支架中,CAG诊断支架再狭窄25枚,支架通畅47枚,而DSCTA诊断支架再狭窄26枚,支架通畅46枚,其中假阴性2枚,假阳性3枚.与CAG相比DSCTA诊断支架术后再狭窄的灵敏度、特异度、阳性预测值、阴性预测值分别为92.00%、93.61%、88.46%、95.65%.结论 DSCT冠状动脉成像是一种简便易行、安全有效的无创性检查方法,可作为冠状动脉支架术后随访观察的手段.

英文摘要：

Objective To assess the clinical value of daul-source CT （DSCT） coronary angiography for detecting restenosis after stenting. Methods 34 patients with 72 previously implanted coronary stents underwent DSCT and coronary angiography（CAG）. The shape of the stents and the patency inside the stents and the vessel at the both side of the stents were evaluated by CT post-processing images comparatively with that of CAG. Results In 34 patients with 72 implanted coronary stents,restenosis of the stents was found in 25 stents and in 26 stents by CAG and DSCT angiography, respectively,and the false negative in 2 and false positive in 3 were presented with DSCT angiography. The sensitivity, specificity,positive and negative predictive value with DSCT angiography in detecting restenosis after stenting were 92.00% ,93.61 % ,88.46%o and 95.65% compared with that of CAG. Conclusion DSCT coronary angiorgraphy is a safe, simple and reliable non-invasive examination for evaluating the coronary artery stent, which can be an effective tool in diagnosing restenosis after coronary artery stenting.