Ultrasound is an indispensable means of clinical examination because of its non-invasive, harmless, simple, convenient, cheap and accurate advantages. For patients with liver disease, ultrasound examination is even more frequent and many times, but some people are foggy and unclear about the examination results and intervals, the purpose and significance of the examination. Here, the following points for patients with liver disease to understand. 1, normal liver size is normal, the shape is proportional, the edge is sharp, careful friends can observe the fresh pig liver, the edge is very thin and sharp, then, once the liver is sick, inflammation, hepatocyte swelling, we ultrasound observation, the first appearance of the liver edge blunt, and the order is from the right edge of the liver to the left edge of the liver, and then to the whole edge of the liver, at this time, the liver shape is full, the texture of the texture such as a hairy glass-like, less than uniform, this kind of This is a chronic inflammatory condition that can last for a long time, even years. This condition can last for a long time or even for many years in chronic inflammation, and the margin of the liver will be slightly blunt or obtuse in the ultrasound report. 2, long-term chronic inflammation, such as with the development of the disease, there will be hepatocellular degeneration, partial necrosis, hyperplasia, liver fibrosis hyperplasia nodules, ultrasound shows that the liver is uneven in texture, small nodule-like, and the hepatic blood vessels become thinner and narrower due to hyperplasia and compression. In the report, there will be increased and enhanced hepatic echoes, uneven or uneven distribution or obvious unevenness, and the ductal structure will be unclear or unclear. 3, a large number of liver cells degeneration necrosis fibrosis, then gradually appear cirrhosis, at this time the hepatic portal vein can become wide, the normal is less than 1.3cm, greater than 1.4cm should be wide, but to comprehensive analysis. 4, for patients with chronic liver disease, chronic hepatitis to ultrasound and other imaging can diagnose cirrhosis criteria this period is long, some decades, and this period can not be assessed is chronic inflammation or fibrosis or early cirrhosis, imaging can diagnose cirrhosis is already more advanced, for example, liver shrinkage, morphology, surface uneven, uneven texture, portal vein widening, splenomegaly and umbilical vein opening to form portal hypertension. The veins may open up to form portal hypertension, etc. 5, only liver puncture biopsy can determine the severity of early cirrhosis or fibrosis or inflammation at the cytological level, from the 1980s ago, the diagnosis of liver disease is mainly in the degree of ocular scleral jaundice, the size of the liver by hand, checking the liver function of the blood to diagnose, and sometimes the liver disease is very serious and not enlarged, but rather shrunken, and the hand can not be felt. Since then, with ultrasound and other imaging tests, you can observe the size and shape of the liver, the texture of internal tissues, blood vessels, has made a big step forward, but you want to understand the situation at the cellular level, you can only observe with the help of a microscope, so the liver biopsy is at the cellular molecular level of the observation of the disease. 6, ultrasound mainly observe the blood flow of hepatic blood vessels, whether there is reflux of portal vein, whether the collateral circulation is open, such as attached umbilical vein, gastric coronary vein, fundic vein, splenic and renal veins, etc., as long as it is open, it means that there is high pressure of hepatic portal vein, we should pay special attention to the food and drink, don’t eat the fish thorns, chicken bones, in order to prevent cutting the esophageal vein caused hemorrhage, or even death. 7, not all hepatitis cirrhosis is necessarily hepatitis B and C. In fact, there are many kinds of liver disease, such as autoimmune liver disease, drug liver disease, vascular liver disease, such as Bu-Ga syndrome, stasis cirrhosis, alcoholic cirrhosis and so on. 8, chronic liver disease requires three months to check the ultrasound, the purpose of one is to understand the liver texture, more important is to monitor the emergence of early hepatocellular carcinoma, early tiny hepatocellular carcinoma in 1-2cm has been able to be found, early treatment is of great significance. 9, routine examination of liver ultrasound should not wait until the pain in liver area because there are nerves in liver peritoneum and there is no innervation in liver parenchyma, therefore, only when the liver tumor grows to a big enough size and stimulates the liver peritoneum, the pain in liver area will be felt, and at this time of examination, the tumor is often very big and belongs to the advanced stage, which makes the treatment particularly difficult and ineffective. If abnormal nodules are found in routine examination, ultrasonography or even biopsy can quickly determine whether it is liver cancer or not. Early stage microscopic liver cancer, no matter it is surgery or ablation, the curative effect is quite good, and it is common to survive for 5 years or 8 years, and it can even be completely cured. 10, liver examination to choose the doctor, now ultrasound doctor is particularly hard, from head to foot, the patient is also more, every day in the black house to complete a large number of jobs in a short period of time, but the industry has specialization, some doctors favor cardiology, some favor obstetrics and gynecology, some favor vascular, some favor abdominal, some favor interventional therapy, you need to choose the ultrasound doctor who has experience in the liver to maximize the misdiagnosis, do not miss diagnosis, and it is best to establish a medical history. It is necessary to choose a doctor experienced in liver ultrasound in order to maximize the number of misdiagnoses and omissions, and it is best to establish a medical record file to maintain continuous records for summary analysis.