Objective To describe the types of hepatic venous drainage by 3D reconstructed CT images, so as to provide anatomical reference for preoperative preparation and intraoperative guidance of hepatic surgery. Methods A total of 406 contrast-enhanced CT images of the abdomen were collected randomly. The anatomic morphology of hepatic veins and the type classification were observed and analyzed by volume reconstruction (VR), multiplanar reformation (MPR), and maximum-intensity projection (MIP). Results The anatomic morphology of hepatic veins (HVs) draining into the inferior vena cava (IVC) was classified into the following four types. Type I: non-trunk type of the left, middle and right HVs, accounting for 23.2% (94). Type II: trunk type of left and middle HVs, accounting for 75.1% (305). Type III: trunk type of right and middle HVs, accounting for 0.7% (3). Type IV: trunk type of left, middle and right HVs, accounting for 1% (4). The left hepatic vein was classified into three types. Type I accounting for I7.1% (29), Type II accounting for 80.6% (327), Type III accounting for 12.3% (50). The middle hepatic vein was classified into four types. Type I accounting for 93.1% (378), Type II accounting for 3.5% (14), Type III accounting for 1.2% (5), Type IV accounting for 2.2% (9). The right hepatic vein was classified into three types. Type I accounting for 44.1% (179), Type II accounting for 50% (203), Type III accounting for 5.4% (22). Conclusions Hepatic veins have a variety of types. Venous tributaries could be displayed clearly by VR、MPR and MIP, which will provide reliable anatomical evidence for preoperative preparation and intraoperative guidance of hepatic surgery.
Key words
Hepatic vein /
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Typing /
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Three-dimensional reconstruction /
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CT
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