恶性梗阻性黄疸的影像学诊断价值的ROC分析

目的用受试者操作特性曲线(receiver operating characteristic curves，ROC)分析方法评价超声、CT、核磁共振胰胆管造影(MRcP)对恶性梗阻性黄痘的诊断价值。方法分析疑恶性梗阻性黄痘病例中同时有超声、CT、MRCP资料共65例．经手术与病理证实的恶性梗阻性黄疸病例共40例作为研究对象。用SAS6．12软件进行ROC分析，结果ROC分析显示：超声诊断恶性梗阻性黄疽病例的ROC曲线下面积(Aus)=0．882，CT诊断恶性梗阻性黄痘病例的ROC曲线下面积(Act)=0．920，MRCP诊断恶性梗阻性黄痘病例的ROC曲线下面积(Amrcp)=0．9567。表明MRCP在诊断恶性梗阻性黄痘疾患的价值高于B超、CT。结论对疑恶性梗阻性黄疸的病人超声是首选诊断方法，MRCP、CT的诊断价值高于超声。

Evaluation of imaging modalities in the diagnosis of malignant bile duct obstruction by receiver operating characteristic curves

Objective To evaluate the value of diagnostic Ultrasound?CT and MRCP in patients with malignant bile duct obstruction by Receiver Operating Characteristic Curves(ROC). Methods Ultrasound?CT and MRCP were performed in 65 patients who were suspected to be malignant bile duct obstruction and 40 of them were confirmed by surgical operation ROC curves were analized with SAS6.12 software. Results Area under the ROC curve of ultrasound was (Aus)=0.882, Area under the ROC curve of CT was (Act)=0.920, Area under the ROC curve of MRCP was (Amrcp)=0.956. With statistical analysis, the value of MRCP in the diagnosis of malignant bile duct obstruction was higher than those of ultrasound and CT. Conclusion Ultrasound is the first choice in diagnosing malignant bile duct obstruction,while MRCP and CT are of higher diagnostic efficiency than ultrasound.