Train station through the security check that to the body sweeping things have radiation?

There is radiation, but the harm is not great:\x0d\\x0d\ According to the national standard GB15208.1-2005, the single inspection dose of the X-ray security checker should not be greater than 5μGy, and at the same time in the distance from the outer surface of the equipment at any place of the 5cm (including the entrance and exit of the equipment) the X-ray dose should be less than 5μGy/h.\x0d\ According to the United Nations Scientific Committee on the Effects of Radiation Committee on the Scientific Aspects of Radiation Effects (UNSCEAR) report, the radiation dose from a medical X-ray chest X-ray is 50μGy, which means that even if a person is really put inside this X-ray screening device used by the LRT, it will take about 100 scans to reach the radiation dose received from a chest X-ray. \x0d\\ 2 times a year every day security check is equivalent to taking an airplane for 2 hours \x0d\ Quite a number of netizens have also raised this question, security check a single radiation is very low, but if every day to take the subway, the cumulative amount is not harmful? \x0d\ According to 365 days a year, every day through the subway security check 2 times, the radiation dose according to the national standard GB15208.1-2005 of the maximum standard calculation, passengers annually due to the subway security check to receive the radiation dose is also not greater than 0.01mSv (10μSv), the value is only equivalent to 1.5 days of the natural background radiation dose or take the plane 2 hours of radiation dose, and according to the United Nations Scientific Committee on the Effects of Radiation, the data reported by the United Nations, the general public receives an average annual radiation ceiling dose of 1,000 μGy in addition to natural radiation and medical radiation, therefore, it will not cause harm to passengers. \x0d\ Security check radiation dose is 1% of the radiation dose from a chest X-ray \x0d\ An expert who had been involved in the rail security check radiation dose detection revealed that in the actual measurements, for the rail part of the model of the security check instrument measurement data, the single radiation is only zero point a few μGy, which is considerably lower than the national standard of 5 μGy. \x0d\ After the measurement, the actual rail security check radiation dose detection of a single dose of radiation \x0d\, is indeed equivalent to only 1% of the radiation dose of a single chest X-ray. \x0d\ The X-ray baggage screening machines used in subway light rail stations as well as airports and train stations belong to Class III radiation devices. According to the relevant regulations, the production, sale and use of Class III radiation devices, the application for a license unit should fill out an environmental impact assessment document, which will be reviewed by the environmental protection department before the Radiation Safety License is issued. Although baggage X-ray security checker and medical X-ray diagnostic instrument, are the same, by using X-ray irradiation of the object to be detected in order to obtain the internal image of the object, but the radiation dose of the parcel security checker is much smaller than the medical X-ray diagnostic, because the image of the parcel security checker does not need to be up to the level of medical diagnostic level of resolution. \x0d\ How much radiation affects a pregnant woman's baby \x0d\ "Is there any radiation when a pregnant woman goes through a security check, or not?" This is a question that many pregnant ladies are concerned about radiation. \x0d\ In fact, putting your hand inside the security checker, there is definitely radiation inside the instrument. But the instrument has been tested, the radiation dose is very small, lower than even cell phone radiation, so a momentary stay of a few seconds is no big deal to a person. \x0d\ And in the detection of radiation in the appearance of the screening instrument, the radiation dose within 10 centimeters from the appearance of the screening instrument is only zero point a few μGy. In fact, when pregnant women go through the screening instrument, will not be very close close to the screening instrument, the dose of radiation is very small, and will not affect the pregnant woman and the fetus.