Ultrasound is a diagnostic modality of ultrasound and an auxiliary test that participates in clinical differential diagnosis before color ultrasound. Therefore, ultrasound can find out the corresponding diseases according to the examination position prescribed by the doctor. There are two types of ultrasound probes, one is linear array and the other is convex array. It is mainly used to visualize in gray scale. So ultrasound is mainly to check the abdominal organs and a part of the superficial small organs of the substantive organs, cavity organs is not the strong point of ultrasound. The abdominal organs that are more frequently examined are the liver, gallbladder, pancreas, spleen, kidneys and uterine adnexa, while the superficial organs are mainly the thyroid and breast. When lesions occur in these organs, the organs themselves will show abnormalities, but only the scope, size, shape, boundary and echo of the abnormal echogenicity can be determined, and the nature of the abnormal echogenicity needs other auxiliary diagnoses such as ultrasound and CT. In addition to detecting the basic morphology and size of tissues and organs, ultrasound can also diagnose associated diseases. However, due to the limitations of ultrasound examination, it is easy to cause artifacts or false images. In order to improve the accuracy of diagnosis and better serve the clinic, a comprehensive clinical determination is needed when abnormalities are detected by ultrasound.