Because ultrasound examination has the advantages of non-invasive, painless, no ionizing radiation and radioactive damage, high safety, as well as convenient application, real-time dynamic imaging, relatively low price, high repeatability, wide range of applications, intraoperative bedside examination, and generally no need to use contrast, in addition to conventional ultrasound examination, which is mainly used for morphology and some functional diagnosis. Its clinical significance lies in the fact that ultrasonography can provide more accurate clinical information on normal or abnormal diagnosis, as well as the physical nature of certain lesions, including cystic, solid, mixed cystic and solid, and can provide accurate localization and quantitative, semi-quantitative, qualitative and semi-qualitative information. At the same time, it can provide clinical observation of the clinical efficacy of certain lesions as a follow-up means, and in addition, it has greater social value in clinical research and health examination, and has a pivotal position in the clinic.