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目的：探讨64层螺旋 CT 诊断不同程度冠状动脉狭窄的临床价值。方法选取2013年1月至2014年2月接受救治的冠状动脉疾病患者68例作为研究对象，所有患者均行常规冠状动脉诊断及64层螺旋 CT 诊断，观察比较两种手段诊断不同程度冠状动脉狭窄的敏感度、特异性及诊断准确率。结果64层螺旋 CT 的灵敏度及特异性优于常规冠状动脉造影，差异均有统计学意义（P <0.05）；64层螺旋 CT 对轻度动脉狭窄的诊断准确率优于常规冠状动脉造影诊断，差异比较有统计学意义（P 0.05）。结论对不同程度冠状动脉狭窄患者采取64层螺旋 CT 诊断的灵敏度及准确度较高，有助于改善预后，具有良好的临床应用价值。“,”Objective To investigate the clinical value of 64-layer spiral CT in diagnosing differ-ent degrees of coronary artery stenosis. Methods Sixty-eight patients with coronary artery stenosis from January 2013 to February 2014 were selected as research objects,and they were conducted the routine coronary artery diagnosis and the 64-layer spiral CT diagnosis. Then,the diagnosis sensitiveness,speci-ficity and accuracy rate of the two kinds of methods in diagnosing coronary artery stenosis of different de-grees were compared. Results The sensitiveness and specificity of 64-layer spiral CT were better than routine coronary artery radiography and the differences were significant(P < 0. 05). In addition,the di-agnosis accuracy rate of 64-layer spiral CT in diagnosing mild artery stenosis was higher than that by the routine coronary artery radiography,the differences were significant(P 0. 05). Conclusions The sensitiveness and accuracy rate of di-agnosing oronary artery stenosis of different degrees by 64-layer spiral CT are high,which is good for im-proving prognosis and has good clinical application values.