Ultrasound can examine the liver and is the preferred way to examine the liver, which has now become one of the liver health checkups.Ultrasound examination of the liver is economical, fast and accurate as well as non-invasive.Ultrasound examination of the liver is not only able to understand the size, shape, texture and echogenicity of the liver, but also to further observe the specific conditions of the bile ducts, portal veins and hepatic veins in the liver, such as stones, blood flow and internal diameter, etc. In addition, it can initially determine the type and nature of occupying lesions in the liver. In addition, ultrasound can also initially determine the type and nature of intrahepatic space-occupying lesions.Ultrasound can not only be used for liver examination, but can also be applied to the diagnosis and treatment of the liver. For example, ultrasound localization of liver cyst puncture drainage or liver puncture biopsy. However, ultrasound examination of the liver also has certain limitations, and sometimes it is necessary to further clarify the diagnosis of lesions through liver CT or magnetic resonance.