Ultrasound of the abdomen is used in a wide range of applications. It can assist in the clinical diagnosis of abnormalities in various tissues and organs of the abdomen. The most commonly examined abdominal ultrasound is the abdominal organs and certain cavernous organs, such as the liver, gallbladder, pancreas, spleen, kidneys, and adrenal glands, prostate, ovaries, bladder, and seminal vesicle glands. When these organs are in the middle to late stages of inflammatory response, they are able to show abnormal echogenicity on ultrasound, for example, in hepatitis and nephritis, the sonographic features of thickened and enhanced parenchymal echogenicity are demonstrated. In addition, the diagnosis of occupying lesions is also a strong point of ultrasound, such as certain cysts, hemangiomas, liver cancer, kidney cancer, pancreatic cancer, uterine fibroids, endometrial cancer and other benign and malignant tumors or occupancies. Although ultrasound is affected by many factors for the examination of cavity organs, it also has some clinical significance for the diagnosis of certain cavity organ diseases, such as some benign and malignant tumors of the stomach wall and intestine, intestinal obstruction, acute appendicitis, etc. Ultrasound is quite sensitive for the diagnosis of gallbladder stones, gallbladder polyps, kidney stones, hydronephrosis and peritoneal effusion. In addition ultrasound plays a very important role in prenatal examination of pregnant women and family planning. Therefore, abdominal ultrasound examination is widely used in clinical practice, and the types of diseases that can be helped in clinical diagnosis are particularly numerous.