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目的：探讨放射CT血管造影对冠状动脉疾病的检测效果。方法选取我院2012年8月至2013年8月收治的52例冠状动脉疾病患者为对象，进行放射CT血管造影扫描检查，分别对每例病患的原始检查数据进行1 mm与3 mm重建，探究其临床诊断价值。结果1 mm组冠状动脉钙化斑块检测出53个，其中冠状动脉小钙化斑块数量为44个。把1 mm组进行重建，并以所得数据作为参考标准，3 mm组检测出钙化斑块数量为45个，检查敏感性为84.90%，其中冠状动脉小钙化斑块数量为34个，检查敏感性为77.27%。1 mm组与3 mm组患者冠状动脉钙化斑块与小钙化斑块检测数量比有明显差异，后者数量与敏感性相对较低，P<0.05，具有统计学意义。另外，冠状动脉狭窄敏感性检测为93.7%，特异性检测为93.7%，阳性、阴性预测值分别为90.6%、96.9%。结论使用放射CT血管造影进行冠状动脉疾病检测时，不同层建厚度所检测出的钙化斑块情况是有差别的，且放射CT血管造影在诊断冠心病钙化斑块、冠状动脉血管狭窄方面效果显著，值得临床推广使用。“,”Objective to investigate the detection effect of radiation CT angiography of coronary artery disease. Methods 52 cases of patients with coronary artery disease in our hospital from 2012 August to 2013 August were as the object of radiation CT an-giography scan were 1 mm and 3 mm reconstruction for each patient of the original test data, to explore the clinical diagnosis val-ue. Results of the 1 mm group coronary artery calcified plaque detected 53, of which the number of coronary calcified plaque was 44. The 1 group mm were reconstructed, and the data as the reference standard, 3 mm were detected for the number of calcified plaque was 45, sensitivity was 84.90%, of which the number of coronary calcified plaque was 34, sensitivity was 77.27%. 1 mm group and 3 patients in the MM group coronary artery calcified plaque and small calcified plaque detection than the latter. There was obvious difference in number and relatively low sensitivity to P <0.05, with statistical significance. In addition, the detection sensitivity of coronary artery stenosis was 93.7%, specificity of 93.7%, positive and negative predictive values were 90.6% and 96.9%. Conclusion the use of radiation CT angiography for detecting coronary artery disease, calcified plaque of different layer thickness detected is different, and the radiation CT angiography in the diagnosis of coronary calcified plaque, coronary artery stenosis was significant effect, worthy of clinical popularization and use.