64层螺旋CT判定冠状动脉中重度狭窄的研究

目的 评价64层螺旋CT(64 SCT)冠状动脉成像判定冠状动脉中重度狭窄的准确度.方法 选择72例临床疑诊冠心病的患者先后行64 SCT冠状动脉成像和选择性冠状动脉造影(SCAG).对两种方法判定冠状动脉中重度狭窄的结果进行对照研究.结果 72例SCAG显示的720节段冠状动脉图像中,64 SCT提供可供分析为684节段,可评估率为95.0%.与SCAG对照分析,64SCT判定冠状动脉中重度狭窄(狭窄度≥50%)的敏感度、特异度、阳性预测值、阴性预测值以及准确度分别为67.4%、92.9%、69.5%、92.3%和88.0%.结论 64 SCT冠状动脉成像作为非侵入性检查方法对检出冠状动脉中重度狭窄有较高的准确度,可用于冠心病的初步筛查.

The research of 64-slice spiral CT in assessing the mild and severe stenosis of coronary artery

Objective To evaluate the accuracy of 64-slice spiral CT(64 SCT)in assessing the mild and severe stenosis of coronary artery.Methods A total of 72 patients suspected to suffer from coronary artery disease underwent orderly both 64 SCT and selective coronary angiography(SCAG).Volume rendering (VR),multi-planar reconstruction(MPR),maximum intensity projection(MIP)and transverse section wasused to analyze the 64 SCT data.The results were compared with those of SCAG to investigate the accuracy of the 64 SCT in assessing the≥50% stenosis of coronary artery.Results In the 720 SCAG segments of 72 patients.684 of them could be evaluated by 64 SCT.The evaluated rate Was 95.0%.Compared with SCAG,the sensitivity,specificity,positive predictive value,negative predictive value and accuracy rate was 67.4%,92.9%,69.5%,92.3% and 88.0% respectively.Conclusion The accuracy of 64 SCT in assessing mild and severe stenosis is relatively high and it can be used for screening patients with suspected coronary artery diseases as a non-invasive method.