应用ROC曲线评价64排螺旋CT血管造影对冠状动脉狭窄的诊断价值

目的用受试者工作特征（ROC）曲线评价64排螺旋CT血管造影（MSCTA）诊断冠状动脉狭窄（GAS）的价值。方法选择行MSCTA检查及冠状动脉血管造影（CAG）的冠状动脉狭窄患者30例，以CAG检查结果为“金标准”，绘制MSCTA诊断CAS正确率CAS程度的ROC曲线并计算曲线下面积（AUC）。结果MSCTA诊断CASiE确率的AUC达（0．969±0．015），（P〈0．001），SCTA诊断CAS狭窄程度ROC曲线的AUC为（O．758＋0．055），（P〈0．05）。结论SCTA作为一种无创的影像学检查方法，对CAS的诊断具有较高的准确性，可以成为CAS的定量评价和介入治疗的有效筛选手段。

Value of 64-slice spiral computed tomography angiography of coronary artery stenosis by receiver operating characteristic curves

Objective To evaluate the value of 64 multi-slice spiral computed tomography angiography （MSCTA）in diagnosis of coronary artery stenosis （CAS） by receiver operating characteristic （ROC） curves. Methods Thirty patients were performed MSCTA and coronary angiography （CAG）. ROC curve of CAS diagnosis by MSCTA and degree of CAS were drawn with the CAG results as ＂gold standards＂, and the values of area under the curve （AUC） were calculated. Results The results of ROC in diagnosing CAS by MSCTA demonstrated that the AUC reached （0.969±0.015） （P〈0.001）. The results of ROC in diagnosing the degree of CAS by MSCTA demonstrated that the AUC reached （0.758±0.055） （P〈0.05）. Conclusion As a kind of non-invasive imaging, MSCTA, with high accuracy in diagnosing CAS, may become an effective screening method for the quantitative evaluation of and intervention therapy for CAS.