目的 研究冠脉CT血管成像对冠 脉支架置入后再狭窄的诊断价值。方法 选取我院2014年9月至2016年3月87例冠 脉支架置入术后复查患者为研究对象，所 有患者均在接受冠脉CT血管成像检查后 1-14d内行冠状动脉造影检查。选取126枚 图像质量良好支架进行影像学评价，以冠 状动脉造影结果为金标准，计算冠脉CT血 管成像诊断冠脉支架置入后再狭窄的灵敏 度、特异度、阳性预测值、阴性预测值、 准确性。结果 冠脉CT血管成像诊断支架 内再狭窄的灵敏度、特异度、阳性预测 值、阴性预测值、准确率分别为80.0%、 96.9%、88.9%、93.9%、92.9%。结论 冠 脉CT血管成像是一种无创、便捷、可靠的 冠脉病变检查方法，可以准确评估冠脉支 架置入后再狭窄，有助于患者术后治疗。

Objective To study the value of coronary CT angiography in the diagnosis of restenosis after coronary stent implantation. Methods 87 cases of patients who received reexamination after coronary stent implantation from March 2014 to March 2016 were selected as the subjects, and all patients underwent coronaryangiography at 1 day to 14 days after coronary CT angiography.126 stents with good-quality imageswere selected for imaging evaluation. With the results of coronary angiography as the golden standard, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy of coronary CT angiography in the diagnosis of restenosis after coronary stent implantation were calculated. Results The sensitivity, specificity, positive predictive value, negative predictive value and accuracy rate of coronary CT angiography in the diagnosis of instent restenosis were 80%, 96.9%, 88.9%, 93.9% and 92.9%, respectively. Conclusion Coronary CT angiography is a noninvasive, convenient and reliable method for the detection of coronary artery disease. It can be used to assess restenosis after coronary stent implantation, which is helpful for postoperative treatment of patients.