In the clinical is no three-dimensional ultrasound this statement, should be three-dimensional ultrasound. Three-dimensional ultrasound includes static three-dimensional imaging and dynamic three-dimensional imaging, dynamic three-dimensional imaging has a time factor. Static and dynamic three-dimensional ultrasound imaging reconstruction principle is basically the same, are two-dimensional ultrasound image of three-dimensional reconstruction. Therefore, the cost of 3D ultrasound is relatively high compared to other ultrasound examinations, such as prenatal 3D ultrasound examination of the fetus, which is generally three to four times the cost of ordinary ultrasound programs. For example, the cost of a general ultrasound examination is about 80 yuan, then the three-dimensional ultrasound examination is about 300 yuan. The general ultrasound examination requires the ultrasonographer to retain static images of about a dozen or several dozen images. However, the acquisition of three-dimensional ultrasound images requires the scanning of a large number of original two-dimensional images to obtain multiple cross-sectional images, and then through the processing of the images, a three-dimensional database is established, which can make the parts and structures shown present three-dimensional images, as well as show their spatial relationship with the surrounding tissues and organs, so that a clear understanding of the parts examined can be more intuitive. Therefore, the 3D ultrasound examination has high requirements for ultrasonographers and ultrasound instruments. Therefore, compared to general ultrasound, the cost of 3D ultrasound is relatively high. When medical institutions and price departments set their fees, the fees for 3D ultrasound are relatively high.