电子束CT检测冠状动脉钙化的方法及初步结果报告

The Detection of Coronary Artery Calcification with Electron Beam CT:A Report of the Methods and Preliminary Results

目的：报告电子束ＣＴ检测冠状动脉钙化（ＣＡＣ）的方法和初步研究结果。材料和方法：将经ＩｍａｔｒｏｎＣ－１５０电子束ＣＴ机检查冠状动脉的９０例分为三组：（１）非冠心组；（２）可疑组；（３）冠心组。对各例冠状动脉的走行进行观察；对比分析各组ＣＡＣ的发生率和钙化定量积分。结果：电子束ＣＴ能清晰地显示冠状动脉主干及主要分支。ＣＡＣ发生率冠心组为９５．０％（１９／２０例），可疑组为４８．６％（１７／３５例），非冠心组为２２．９％（８／３５例），差别具有显著性（ｐ＜０．００１）。发生ＣＡＣ的４４例中，冠心组的定量总分显著高于可疑组和非冠心组（Ｐ值分别＜０．０５和＜０．０１）。结论：电子束ＣＴ检测ＣＡＣ可为早期冠心病的诊断、预测和防治提供依据。

Reporting the methods and preliminary results of the detec tion of coronary artery calcification (CAC) with electron beam CT. Materials and Methods:The coronary arteries of 90 cases were examined with Imatron C-150 electron beam CT scaner. They were divided into three groups:Group A: without coronary disease; Group B:with doubtful coronary disease,Group C:with coronary disease; The tracks of all coronary arteries were traced under observation. The occurance rate and quantitative score of CAC were compared among the three groups.Results: The main trunks and major branches of coronary artery can be shown clearly by electron beam CT. The rate of CAC in group A was 95% (19/20 cases), in group B was 48.6% (17/35 cases)and in group C was 22.9% (8/35 cases).Their differences were statistically significant (P<0.001).In 44 cases of CAC, the mean quanfifative score of group A was significantly higher than that of group B and group C (P< 0.05 and<0.01, respectively) . Conclusion: The detection of CAC with electron beam CT can offer reliable informations for the diagnosis, prediction,prevention and cure of early coronary disease.