A: 3D reconstructed image of the intrahepatic vessels and tumor from dynamic CT images. The tumor, with a 65 mm diameter, was located in segment 4/8 and involved middle hepatic vein. Blue, portal vein; White, hepatic vein; Brown, tumor; Red broken line, cut line of resection of segment 4 and ventral area of the right anterior section. B: Simulation of the resection Orange area, segment 4; Yellow area, ventral area of the right anterior section. C: Magnetic resonance image, with the yellow arrow showing the middle hepatic vein. D: The 3D printed model of intrahepatic vessels model used in the operative field. E: The 3D printed model of the intrahepatic vessels after painting specifically for the figure. F: Transected surface of the liver.