MR virtual endoscopy: a study of clinical applications in cholangiopancreatography
- VernacularTitle:胆管磁共振仿真内窥镜的临床应用研究
- Author:
Tao JIANG
;
Xiaojuan LIU
;
Renyou ZHAI
- Publication Type:Journal Article
- Keywords:
Magnetic resonance imaging;
Bile duct obstruction, extrahepatic;
Endoscopes;
Image processing, computer-assisted
- From:
Chinese Journal of Radiology
2000;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
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.
