Figure 3b. Reformatted images from CT (a) and MR imaging (b) data depict the normal course and branching pattern of the hepatic artery. Note that in a, the gastroduodenal artery (curved arrow) branches off from the common hepatic artery (CHA). The proper hepatic artery divides into the left hepatic artery (LHA) and right hepatic artery (RHA). CA = celiac artery, SMA = superior mesenteric artery.