Ultrasonic imaging

Ultrasound is a type of mechanical wave that is used in medicine to image human tissues through wave scattering (the phenomenon of sound waves scattering outwards when encountering uneven structures), known as ultrasound and color ultrasound. There are differences in the speed and density of sound in different tissues and organs of the human body. After the sound waves are emitted by the ultrasonic probe and transmitted to the human body, they will produce strong and weak reflection and scattering waves at the interface and uneven areas inside the organs, and finally return to the transducer on the surface of the body (the core component responsible for emitting and receiving sound waves inside the probe). Ultrasound examination requires the application of a coupling agent, which can eliminate the air between the probe and the skin, thereby improving the clarity of image display. Ultrasound diagnosis includes vascular ultrasound, cardiac ultrasound, abdominal ultrasound (visceral), thyroid ultrasound, breast ultrasound, obstetric and gynecological ultrasound, etc.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The physical characteristics of ultrasound: the higher the frequency, the higher the resolution, but the weaker the penetration power; The lower the frequency, the better the penetration, but the poorer the resolution. In clinical applications, ultrasound requires high resolution (high frequency) and sufficient penetration depth to see deeper structures (low frequency) in order to obtain clear images. Therefore, it is necessary to choose the optimal frequency. If the frequency is too high, the penetration depth of ultrasound may not be sufficient, and the desired structure may not be achieved; If the frequency is too low, ultrasound will penetrate deeper than necessary, and unnecessary low frequencies will produce blurry low resolution images.