The right hepatic artery is a terminal branch of the proper hepatic artery. It serves the right lobe of the liver. It goes over the common hepatic duct posteriorly in many people. However, occasionally it may cross anteriorly. The artery circles inferiorly in the cystohepatic angle. It may even reach the cystic duct.
From here it separates in the liver substance into an anterior segmental artery, serving liver segments V and VIII, and a posterior segmental artery that provides for segments VI and VII. It’s typical to see a caterpillar loop configuration in the anterior segmental artery.
The posterior segmental branch falls superior to the anterior branch and often supplies a branch to the gallbladder and caudate lobe.