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Preliminary Clinical Application of contrast-Enhanced MRPortography

Journal of Huazhong University of Science and Technology(Medical Sciences) 1999年第4期19卷 323-327页

作者：杨炼孙祥泉刘定西肖学宏冯敢生 Department of Radiology Xiehe Hospital Tongji Medical University Wuhan 430022.

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.

关键词： portal vein MR vessels contrast-enhancement

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Diagnosis of bowel diseases:The role of imaging and ultrasonography

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World Journal of Gastroenterology 2013年第14期19卷 2144-2153页

作者： Davide Roccarina Matteo Garcovich Maria Elena Ainora Gianluigi Caracciolo Francesca Ponziani Antonio Gasbarrini Maria Assunta Zocco Department of Internal Medicine Catholic University of Rome

Examinations with a visualisation of the anatomy and pathology of the gastrointestinal(GI) tract are often necessary for the diagnosis of GI *** radiology played a crucial role for many ***,despite some limitations,remains the main technique in the differential diagnosis and treatment of GI *** the last decades,the introduction of,and advances in,non-invasive cross-sectional imaging modalities,including ultrasound(US),computed tomography(CT),positron-emission tomography(PET),and magnetic resonance imaging,as well as improvements in the resolution of imaging data,the acquisition of 3D images,and the introduction of contrast-enhancement,have modified the approach to the examination of the GI ***,additional co-registration techniques,such as PET-CT and PET-MRI,allow multimodal data acquisition with better sensitivity and specificity in the study of tissue *** has had a growing role in the development and application of the techniques for diagnosis and management of GI diseases because it is inexpensive,non-invasive,and more comfortable for the patient,and it has sufficient diagnostic accuracy toprovide the clinician with image data of high temporal and spatial ***,Doppler and contrastenhanced ultrasound(CEUS) add important information about blood *** article provides a general review of the current literature regarding imaging modalities used for the evaluation of bowel diseases,highlighting the role of US and recent developments in CEUS.

关键词： Gastrointestinal tract Bowel Imaging Ultrasound Colour-Doppler contrast-enhancement Time-intensity curve

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