关键词:  , 肝, 　门静脉, 　肝静脉, 　下腔静脉, 　静脉分流, 　MRI

Abstract: Objective　To investigate the MRI features of intrahepatic portal-systemic venous shunt. Methods　Upper abdominal plain scan and dynamic contrast-enhanced scan were performed with 1.5T or 3.0T MRI. A retrospective research was carried out to analyze the imaging data of 36 patients with IPSVS (PHVS 29 cases, PIVCS 7 cases).　Results　The first subtype of the first type (72.2%) in Tanoue classification and Park II (58.3%) classification were the most common types of IPSVS. The site of PHVS except the segment I of the liver existed, and the segments III, VI, and VIII were more common. The distribution was similar in the liver and the perihepatic and subcapsular, with one lesion as the main lesion and two or more lesions rare. The morphology was mainly nodular, followed by aneurysm, and the sinusoidal and mixed forms were rare. The lesion size was mostly larger than 1.0 cm, and a few were less than 1.0 cm: PIVCS  located in the liver I, VI, VII segment, distributed in the liver-perihepatic-extrahepatic more common, intrahepatic-perihepatic and capsular next, rare in the liver. T1-weighted image, IPSVS showed that the low signal in the upper and lower continuous layers of the liver was connected with the intrahepatic vessels. T2-weighted image showed that most of the flow was low signal and a little high signal. The characteristic manifestation was the blood supply portal vein, drained hepatic vein and inferior vena cava.　Conclusions MRI can show clearly and well the vascular abnormalities of IPSVS . 

Key words: Liver, 　Portal vein, 　Hepatic vein, 　Inferior vena cava, 　Venous shunt, 　MRI