Liver ultrasound is currently the preferred and most basic form of liver imaging. Liver ultrasound can not only show the size, echogenicity, portal vein and hepatic vein internal diameter of the liver, but also whether there are occupying lesions in the liver, whether the intrahepatic bile ducts are dilated or narrowed, and whether there are stones. The diseases that can be initially diagnosed by liver ultrasound include cirrhosis, intrahepatic bile duct stones, hepatic hemangioma, liver cysts, and primary liver cancer. In addition, liver stiffness values can also be measured by ultrasound technology, which can reflect the degree of liver fibrosis. Liver ultrasound is currently used clinically not only as an examination modality but also as a means of localization, such as liver puncture biopsy or placement of a tube for drainage under ultrasound localization. Ultrasound of the liver also has certain limitations, for example, for many occupying lesions, further enhanced CT or MRI is required to determine the nature of the disease and the specific disease more accurately.