fig1

Figure 1. (A) The Synapse 3D software isolates the liver from each available axial cut of the CT. This can be manually fine-tuned where necessary, as the spleen may occasionally be misidentified as liver, especially when the lateral segments come into close contact with the spleen; (B) A 3D image of the liver is constructed, allowing the surgeon to visualize the surface contours of the liver; (C and D) The portal vein inflow branches are highlighted in pink and the hepatic vein branches are highlighted in blue; (E) A 3D view of the liver is then reconstructed, which can be rotated in any direction to provide the surgeon with spacial clarity. In this image, the left inflow is selected to demonstrate its corresponding simulated boundary. Notably, the posterior sectoral PV arises directly off the main PV, and the anterior PV and left PV bifurcate thereafter. 3D: 3-dimensional; CT: computer tomography; PV: portal venous.