Abstract: Objective The purpose of this study was to investigate pre- and post-operative evaluation of hepatic blood supply by CT angiography (CTA) in patients undergoing liver transplantation(LT). Methods A total of 129 patients with various liver diseases were encountered in our hospital between December 2020 and May 2023, and all underwent LT. Pre- and post-operationally, CTA and ultrasonography (US) were conducted to evaluate the general structure of the hepatic artery and vein, including inferior vena cava, portal vein and hepatic vein. Results Of the 129 patients receiving LT, CTA showed Michels type I hepatic artery in 99 cases (76.7%), type II in 8 cases, type III in 7 cases, type IV in 5 cases, type V in 3 cases, type VI in 3 cases and others in 4 cases, all proven by surgery; the sensitivity by CTA for combined trunk of middle and right hepatic veins, for combined trunk of middle and left hepatic veins, for combined trunk of left, middle and right hepatic veins, the accuracy for left, middle and right hepatic veins and sensitivity for no combined vein were 86.2%, 94.7%, 100.0%, 80.6% and 89.1%, all much superior to 58.6%, 65.8%, 60.0%, 52.4% and 62.2%(P<0.05) by US; post-operationally, the sensitivity for portal vein thrombosis, for portal vein tumorous thrombus, the accuracy for portal vein tumorous thrombus, for hepatic vein occlusion, the sensitivity and accuracy forinferior vena cava stenosis by CTA were 89.5%, 80.0%, 71.4%, 96.7%, 88.9% and 87.5%, all much superior to 52.6%, 50.0%, 50.4%, 65.6%, 44.4% and 57.5%(P<0.05) by US. Conclusion The CTA has a accuracy in examining the patency of liver vasculature, which might guide surgery strategy and post-operational surveillance.

Key words: Liver transplantation, CT angiography, Hepatic artery, Inferior vena cava, Portal vein, Hepatic vein, Diagnosis