Fig. 2.

Network of interconnected artery branches used in the numerical model to describe the hepatic arterial system. The artery system is split into levels whose boundaries are located at the artery branch bifurcations. The proper hepatic artery (Level 0) bifurcates into the left hepatic artery and right hepatic artery (Level 1), which further splits into four daughter arteries (Level 2), eight segmental arteries (Level 3) and twenty-four sub-segmental arteries (Level 4). At each artery bifurcation, two communicating arcades join the diverging artery branches downstream of the bifurcation. Communicating arcades joining the daughter arteries (Level 2), the segmental arteries S3 and S1 (Level 3) and the segmental arteries S5 and S6 (Level 3) are also included. The tumour is located in segment S4 and the balloon is positioned in the left daughter artery feeding the segments S1 and S4