In recent years, there has been a rapid increase in reports of clinical applications of 3D ultrasound diagnosis in areas such as cardiovascular diseases and obstetrics and gynecology. This fact shows that 3D ultrasound imaging has gradually become practical in terms of technology on the one hand, and on the other hand, it also indicates that 3D ultrasound does have a wide application prospect in clinical practice. Compared with the traditional two-dimensional ultrasound imaging, three-dimensional ultrasound imaging has the following advantages: 1, the image display intuitive After collecting the three-dimensional data of the human body structure, doctors can realize the magnification, rotation and dissection of the image through human-computer interaction, and observe the section of the organ or the whole from different angles. This will greatly help the doctor to fully understand the condition and improve the accuracy of disease diagnosis. 2. Accurate measurement of structural parameters Ventricular volume, endocardial area, etc. are important bases for the diagnosis of cardiovascular diseases. After obtaining the three-dimensional structural information of the organ, the accurate measurement of these parameters has a reliable basis. 3.Accurate localization of diseased tissues Three-dimensional ultrasound imaging can provide doctors with the spatial location of tumors (especially abdominal liver, kidney and other organs) in the body and their three-dimensional morphology, thus providing a basis for conducting extracorporeal ultrasound therapy and ultrasound-guided interventional treatment procedures. This will help to avoid damaging normal tissues during the treatment. 4.Shorten data acquisition time A successful 3D ultrasound imaging system can acquire enough data in a very short time and store it in the computer. The physician can use the images stored in the computer to make a diagnosis without repeatedly scanning the patient with the 2D probe. Even after the patient leaves the hospital, the physicians can look at the diseased tissue and organs from different angles together.