The ultrasound has no radiation to the human body.
The ultrasound utilizes the principle of ultrasound, and the nuclear magnetic **** vibration utilizes the principle of magnetic field imaging, not X-rays, so there is no radioactivity and no radiation hazard.
Radiation is in fact everywhere, not only in the hospital, the earth itself there is background radiation. The radiation emitted by the Earth is about 2mSv per year, and the higher the altitude of the region, the more residents are exposed to the Earth's radiation. There's also subway baggage security, and the see-through security used abroad uses X-rays.
B-type ultrasound is the main method of ultrasound examination, ultrasound examination of ultrasound waves emitted is a high-frequency sound waves, there is no radioactivity, will not be harmful to the human body. Therefore, ultrasonography is safe and harmless to the human body and safe for pregnant women and fetuses.
Extended information:
The principle of ultrasound is to use ultrasound waves encountered in different tissues to produce reflected waves, and the probe emits and receives sound waves on one side, and calculates the reflected waves through the Imaging. It's like picking a watermelon, knocking on it while listening to the sound to determine if it's ripe.
B ultrasound is known for its low intensity, high frequency, no damage to the human body, no pain, and a variety of display methods. In particular, it is unique in its ability to detect the soft tissues of the human body and observe the blood flow in the blood vessels. Due to the weak penetration of ultrasound, the gas-containing organs or smaller lesions are difficult to detect, such as 1cm of tumor tissue ultrasound is not easy to detect, there are certain limitations.
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