摘要
The clinical application of contrast enhanced (CE) MR was evaluated.A total of 66 CE MR portograms were obtained by per forming fast imaging with steady procession (FISP) technique on a 1. 5-T Siemens magnetom vision. A maximum intensity projection algorithm was also employed to include all vessels in a single image. The patency of portal venous system, the presence and extent of varices were also evaluated. The results showed that all images had diagnostic quality. Main portal vein (MPV) and its 4th-6th level intrahepatic branches were visualized in 10 normal persons serving as control. The diameter of MPV,splenic vein and superior mesenteric vein was 1.02±10. 21, 0. 8±0. 15, 0.8±0. 26 cm respectively, which were significantly lower than that in portal hypertension patients (1. 38±0. 27, 1. 26±0. 18, 1. 24± 0.18cm, respectively). In 23 preop-erative cases of portal hypertension, dilated portal vein and tortuous enlarged splenic vein were found in 23 cases; esophageal and coronary varices in 12 and 19 cases, respectively. In 7 postoperative re-examined cases with portal hyperten-sion, the flow velocity and flow of MPV were decreased in all cases and esophageal varices could still be observed in 3 cases. New vessels appeared in the great curvature of stomach in 2 cases. In 20 cases of liver carcinoma, occlusion of MPV or its intrahepatic branches were showed in 14, compression and dislocation of intrahepatic portal vein were found in 6. In other 6 cases, 2 were splenic ve-nous thrombosis and 4 were tumors in the intestine or retro-peritoneum. It is con-cluded that three-dimensional CE MR portography is an accurate technique for e-valuating the portal venous system. It is a reliable and noninvasive technique that can provide important information for the evaluation of patients' condition be fore TIPSS and liver transplantation.
The clinical application of contrast enhanced (CE) MR was evaluated.A total of 66 CE MR portograms were obtained by per forming fast imaging with steady procession (FISP) technique on a 1. 5-T Siemens magnetom vision. A maximum intensity projection algorithm was also employed to include all vessels in a single image. The patency of portal venous system, the presence and extent of varices were also evaluated. The results showed that all images had diagnostic quality. Main portal vein (MPV) and its 4th-6th level intrahepatic branches were visualized in 10 normal persons serving as control. The diameter of MPV,splenic vein and superior mesenteric vein was 1.02±10. 21, 0. 8±0. 15, 0.8±0. 26 cm respectively, which were significantly lower than that in portal hypertension patients (1. 38±0. 27, 1. 26±0. 18, 1. 24± 0.18cm, respectively). In 23 preop-erative cases of portal hypertension, dilated portal vein and tortuous enlarged splenic vein were found in 23 cases; esophageal and coronary varices in 12 and 19 cases, respectively. In 7 postoperative re-examined cases with portal hyperten-sion, the flow velocity and flow of MPV were decreased in all cases and esophageal varices could still be observed in 3 cases. New vessels appeared in the great curvature of stomach in 2 cases. In 20 cases of liver carcinoma, occlusion of MPV or its intrahepatic branches were showed in 14, compression and dislocation of intrahepatic portal vein were found in 6. In other 6 cases, 2 were splenic ve-nous thrombosis and 4 were tumors in the intestine or retro-peritoneum. It is con-cluded that three-dimensional CE MR portography is an accurate technique for e-valuating the portal venous system. It is a reliable and noninvasive technique that can provide important information for the evaluation of patients' condition be fore TIPSS and liver transplantation.
