Objective:To assess the anatomy of portal vein and hepatic vein with three dimensional 16-MSCT angiography.Methods:A total of 100 healthy subjects underwent upper abdominal MSCT examinations in our department.All subjects were administered 90～120ml of IV contrast material at an injection rate of 3ml/s.The scan delay time was 45～60s and 90～120s for portal venous and hepatic venous phase with automated bolus tracking

respectively.All data sets were reconstructed in 1-mm section and 0.5mm interval

and then were transferred to a workstation for maximum intensity projection(MIP)and volume ren-dering(VR) econstruction.The portal vein anatomy was classified according to Couinaud and Atri’s classification;the hepatic veinanatomy according to Nakamura’s

Marcos’s and Kawasaki’s classification.Results:① Normal portal vein anatomy was seen in 76 cases

type Ⅱin 16

type Ⅲ in 6

type Ⅳ in 2.②Nakamura’s TypeⅠof hepatic vein was presented in 72 cases;type Ⅱ in 22.type Ⅲ in 6.The branching pattern of the middle hepatic vein was type Ⅰin 65 cases

type Ⅱin 19

and type Ⅲ in 16.Segment IVb vein branched from the middle hepatic vein in 42 cases

and from the left hepatic vein in 58.Conclusion:3D 16-MSCTA is a significantly valuable tool which can provide complete and comprehensive information on the anatomy of portal vein and hepatic vein combined with MIP and VR image.