Observation on the course and distribution of the right posterior branch of portal vein in 100 cases

Objective To evaluate the intrahepatic portal veins and hepatic veins of right posterior lobe of liver,put up a definition of hepatic segment for the imaging and liver surgery.Methods Using 100 successive sections of the upper abdomen of adult MRI enhanced images of living donor for liver transplantation.The course and division pattern of the intrahepatic portal vein and the hepatic veins,and also the relationship between them were investigated.Results Among the 100 right posterior of portal veins,arch-like pattern seen in 34 cases,two branches appeared in 27,three branches appeared in 9,variant appeared in 30.Conclusion The right posterior segments can not be identified about 30% by Couinaud's classification.