目的探讨多层螺旋CT血管造影 (CTA)在诊断冠状动脉病变程度中的应用 价值。方法 选取98例拟诊为冠心病的患 者作为研究对象，行128排螺旋CT血管造 影(CTA)检查，以选择性冠状动脉造影 (CAG)检查结果为“金标准”，评估CTA检 查准确率、敏感性和特异性及对冠状动脉 狭窄程度的诊断情况。结果 以CAG为“金 标准”，CAT诊断结果显示，77例为阳 性，22例为阴性，诊断准确率为90.82%； 敏感性为95.71%，特异性为78.57%；CTA 诊断结果显示，974段血管正常，115段 轻度狭窄，107段中度狭窄，90段重度狭 窄，整体准确率为87.64%。结论 CTA在诊 断冠状动脉病变程度中存在局限性。

Objective To investigate the application value of multi-slice spiral CT angiography (CTA) in the diagnosis of coronary artery disease. Methods 98 patients with probable coronary heart disease (CHD) were selected as the research objects. The 128- slice spiral CTA was performed. The results of selective coronary arteriography (CAG) were taken as the golden standard to evaluate the accuracy, sensitivity and specificity of CAG and the diagnosis of the degree of coronary artery stenosis. Results With CAG as the gold standard, CTA diagnosis showed that 77 cases were positive and 22 cases were negative. The diagnostic accuracy rate was 90.82%, sensitivity 95.71% and specificity 78.57%. CTA diagnosis showed that 974 segments were normal, 115 segments were mild stenosis, 107 segments were moderate stenosis and 90 segments were severe stenosis. The overall accuracy was 87.64%. Conclusion CTA has limitations in the diagnosis of coronary artery disease.