Color ultrasound examination includes the following items: First, digestive system, including liver, gallbladder, pancreas and spleen. Color ultrasound can examine common lesions in these areas, such as liver cysts, cirrhosis, liver cancer, gallbladder stones, gallbladder polyps, pancreatitis, splenomegaly, etc. Secondly, the urinary system includes both kidneys, ureter and bladder. Ultrasound can check lesions in these parts, such as kidney cyst, kidney stone, kidney tumor, bladder tumor, bladder stone, etc. Third, the cardiovascular system includes the heart, the blood vessels of the extremities and the large blood vessels of the abdomen, and the color ultrasound can check the lesions in these parts, like cardiomyopathy, heart valve disease, congenital heart disease, atherosclerotic plaque, varicose veins, arterial stenosis, etc. Fourth, the gynecological system includes the uterus and adnexa, and can detect lesions in these areas, such as uterine fibroids, endometrial polyps, cervical cysts, polycystic ovaries and ovarian occupational lesions. Fifth, superficial organs include parotid gland, thyroid gland, breast gland, etc. Ultrasound can detect superficial organs with occupying lesions. At present, higher-end ultrasound instruments can also examine lesions of the thicker nerves, muscles and skeletal system on the body surface.