胆管磁共振仿真内窥镜的临床应用研究

通过胆管磁共振仿真内窥镜（ＭＲＶＥ）加磁共振胰胆管造影（ＭＲＣＰ）的临床应用，探讨其在胆道方面的诊断价值。方法 １４个月４４例有梗阴性黄疸和有胆道症状的患者行胆管ＭＲＶＥ检查。用呼吸门控快速自旋回波（ＦＳＥ）和屏气多层单次激发快速自旋回波（ＳＳＦＳＥ）序列获得的二维重度Ｔ２ＷＩ传输到计算机工作站，用导航软件显示利用表面应答技术的胰胆管内表面的状态。结果 恶性肿瘤１８例，胆结石１７例、术后胆道并发症

MR virtual endoscopy: a study of clinical applications in cholangiopancreatography

Objective To determine the added clinical applications of MR virtual endoscopy (MRVE) plus MRCP in cholangiopancreatography. Methods In 14 month, 44 patients with obstructive jaundice and symptomatic bile trace were assessed by MRVE in biliary tract.The 2D data of heavily T 2 weighted images with FSE(non breath hold, respiratory trigger) and SSFSE(breath hold, multi slice single shot fast spin echo) sequence were transferred to the computer workstation. Navigator software (GEMS) was used to display intraluminal views of the pancreaticobiliary tract with a surface rendering technique. Results Patients suffered from neoplasm ( n =18), bile stone (17), postoperative complications of cholecystectomy( n =3), and other disease of biliary tract( n =6). MRVE could clearly demonstrate the anatomical structures in biliary tract, extended pancreas tract,biliary meatus narrowing and obstruction, bile duct stones, duct branches, and the inner wall of pathological obstruction.The main limitation of virtual endoscopy was inability to evaluate mucosa and lack of histological diagnosis. Sensitivity for detection of bile duct dilatation and site of obstruction was: 2D FSE 91 7%, and SSFSE 97 9%. Conclusion MRVE provided noninvasively endoscope like display of biliary tract.Its display ability was a supplement to image biliary trace. MRVE effect of multi slice SSFSE sequence was better than that of fast spin echo.