目的 分析双源CT(DSCTA)冠状动 脉血管成像对于冠心病患者PCI支架内再 狭窄(ISR)诊断的价值。方法 回顾性分析 2013年7月-2015年3月于我院行PCI患者的 临床资料，筛选67例行DSCTA及冠脉造影 患者作为本次研究对象，以冠脉节段为单 位对比两种检查方式的影像质量，并明确 DSCTA的诊断价值。结果 67例患者共70个 支架，共扫描268个节段，以冠脉节段为 单位，DSCTA的图像质量等级分布与冠脉 造影比较无差异(P﹥0.05)；截止终访，15 例患者经冠脉造影明确为ISR，DSCTA诊断 ISR的灵敏度为94.11%、特异度92.45%、 准确率92.85%、阳性预测值80.00%、阴 性预测值98.00%，Kappa值0.816。结论 DSCTA诊断ISR具良好的诊断效能，与冠脉 造影检查结果一致性良好，且安全性。

Objective To analyze the value of dual source CT (DSCTA) coronary angiography in the diagnosis of PCI in-stent restenosis (ISR) in patients with coronary heart disease (CHD). Methods The clinical data of patients undergoing PCI in the hospital from July 2013 to March 2015 were retrospectively analyzed. 67 patients undergoing DSCTA and coronary angiography were selected as the subjects. The image quality of two examination methods was compared with coronary artery segment as unit, and the diagnostic value of DSCTA was identified. Results There were 70 stents in 67 patients, and 268 segments were scanned. There was no difference in image quality rank distribution between DSCTA and coronary angiography with coronary artery segment as unit (P>0.05). At the end of follow-up, 15 patients were diagnosed as ISR by coronary angiography. The sensitivity, specificity, accuracy rate, positive predictive value, negative predictive value and Kappa value of DSCTA in the diagnosis of ISR were 94.11%, 92.45%, 92.85%, 80.00%, 98.00% and 0.816, respectively. Conclusion The diagnostic efficiency of DSCTA for ISR is good and the consistency with results of coronary angiography is good, with safety.