胆系磁共振仿真内镜的临床应用评价

目的：评价磁共振仿真内镜（MRVE）对胆系梗阻性疾病的诊断价值。方法：47例胆系梗阻性病变的患者行MRVE检查。将快速自旋回波（FSE）和单次激发快速自旋回波（SSFSE）获得的二维T2WI数据传输至工作站,用导航软件显示胆管内腔。结果：MRVE清晰显示了胆管内解剖结构、梗阻部位和梗阻端的表面形态,FSE序列的MRVE和SS－FSE序列的MRVE对病变的定位准确率都为100％,检出病变的敏感性分别为92.2%和96.0%。结论：FSE序列的MRVE和SSFSE序列的MRVE都能显示胆系腔内结构。MRVE是对磁共振胆胰管造影（MRCP）技术的有益补充,但对胆系梗阻性病变诊断的特异性较性。

Clinical application of MR virtual endoscopy of the biliary tract

Objective:To evaluate MR virtual endoscopy (MRVE) in the diagnosis of obstructive biliary diseases. Methods:MRVE was performed in 47 patients with obstructive diseases of biliary tract.The source images with FSE and SSFSE were transferred to the computer workstation.Navigator software was used to display intraluminal views of the biliary tract.Results:The inner structures of the biliary tract were successfully demonstrated in all cases.The site of obstruction and intraluminal morphological features were revealed.Sensitivity of MRVE with FSE and SSFSE was 92.2% and 96.0% respectively.Conclusion:Both FSE and SSFSE MRVE can clearly demonstrate the anatomical structures of biliary tract.MRVE is a supplementary technique to MRCP in the diagnosis of the obstructive biliary diseases,however,it is not specific for the diagnosis of the diseases.