Hepatic angiography is a minimally invasive examination modality in which a catheter is inserted into the hepatic blood vessels under local anesthesia and a contrast agent is injected to further observe whether there is any abnormality in the blood vessels, such as thickening, occlusion, displacement, and deformity. Liver imaging in the clinic, in addition to hepatic angiography, is a way to assist ultrasound, elastography, CT, nuclear magnetism, etc. for the diagnosis of diseases. It includes hepatic arteriography, portal venography, and mixed liver angiography. Hepatic arteriography observes the intrinsic hepatic artery, the right and left branches of the hepatic artery. Portal venography to observe the splenic vein, portal vein and so on. Hepatic angiography can be used not only for the diagnosis of liver tumor, but also for interventional therapy, which can be used for the clinical treatment of primary liver cancer and also for the hemostatic treatment of liver bleeding. However, people with more serious kidney function damage and abnormal coagulation function should not undergo liver imaging.