Tests related to portal collateral circulation: The establishment and opening of portal collateral circulation is a unique manifestation of portal hypertension, which is not only an important basis for the diagnosis of portal hypertension, but also has important clinical significance. Ultrasound diagnosis of liver diseases Ultrasound is a medical test that patients are frequently exposed to during their visits. Ultrasound of the liver is helpful in helping to diagnose liver diseases. Indications Liver cysts, polycystic liver, liver abscess, hepatic hemangioma, splenomegaly, fatty liver, bruised liver, etc. Hepatobiliary dynamic imaging Intravenous injection of a radioactive drug that can be taken up by hepatocytes and excreted via the bile duct, through a process that approximates the processing of bilirubin, which is secreted into the bile and then excreted into the intestine via the biliary system. Dynamic imaging allows us to observe the uptake, secretion, and excretion of drugs into the bile duct and intestine by the liver and to understand the morphology and function of the hepatobiliary system. Hepatic dynamic blood pool imaging Hepatic blood pool imaging is the preferred test for hepatic hemangioma. It has a sensitivity of 92%, specificity of 100% and accuracy of 96%. MRI of liver, bile, pancreas and spleen MRI of liver, bile, pancreas and spleen can clarify the degree and scope of lesions and their characteristics, and can differentiate them from other tumors. It is useful for confirming the diagnosis of liver, spleen cysts and cavernous hemangioma. CT examination of liver, gallbladder and spleen CT examination of liver, gallbladder and spleen is a method to examine liver, gallbladder and spleen by CT.