The veterinary B ultrasound diagnosis method is a gray-scale modulation type, which is referred to as B-type or B-ultrasound, and displays the echo signal in the form of light and dark, that is, gray scale. The echo signal is strong, the light spot is bright; the echo signal is weak, the light spot is dark; if there is no echo, the signal forms a dark area.
The echo signal consists of a two-dimensional tomographic image or a facet image of the probed part from point to line to surface. Therefore, it is also called ultrasonic tomography diagnostic method or facet imaging method. This image is called a sound image. The imaging speed of this method is fast and slow, and the rapid imaging can immediately display the activity state of the investigated organ, which is called real-time imaging diagnosis method, and is now used clinically. At present, there are more portable veterinary B-ultrasounds (hereinafter referred to as B-ultrasound), which are smaller and lighter ultrasonic scanners; but they also have powerful functions to detect early pregnancy and gender. Identification, breeding disease inspection, etc.