The imaging principle of B ultrasound is a more important part of the ultrasound instrument is the probe, also known as a transducer, the probe has a device that emits and receives sound waves. When the body is scanned by the probe, ultrasound waves are emitted by the probe and will encounter different interfaces as they propagate through the tissue, reflecting when encountering large interfaces and scattering when encountering small interfaces. Whether it is reflected echo or scattered echo, it will contain the acoustic information of different tissues, and then receive the acoustic information of different tissues through the probe, after the signal processing system, this information will be displayed on the monitor with waveforms, images, etc. for the doctor’s diagnosis, simply put the principle of ultrasound imaging is through the reflected echo of the probe to imaging.