There is no scientific evidence that radiation from security checks affects health. Are there any health risks? Scanners, like medical X-ray machines, use X-rays to obtain a picture of the subject's internal structure. But the radiation dose from a scanner is much lower than that from a medical X-ray. If you look at this comparison, you should get a sense of that.
According to national standards, X-ray scanners shouldn't deliver more than 5?Gy of radiation in a single exam, and the actual measured radiation dose is much, much lower than that. A medical chest X-ray is 50 microGy.
Security check is the subway and train stations, airports and important departments of the import and export security equipment, is a device that detects a variety of items, the most common is a single X-ray machine, in short, is the use of X-rays through the price of the imaging principle, the object through the security check to get an X image, the image is processed by the computer to display a recognizable image on the computer screen to assess the safety of the object This is similar to the human X-ray in hospitals. This is similar to the human body X examination in the hospital, but the difference is that the X dose of the security screening machine is much lower than the dose of medical X equipment. It has a tube current of 0.4 to 1.2 mA, whereas a medical chest X-ray machine is at least 50 mA, or 50 times higher.
There is no doubt that there must be some dose of X-rays in the security machine compartment, but the human body does not enter and is not exposed to the rays. The key question is whether there is a radiation leak around the screening machine. If there is a leak, it may have a certain effect on the staff who are exposed to it for a long period of time, and it will not have much effect on the people passing by. Generally speaking, a qualified security screening machine will not have this possibility and should be safe, with a standard leakage dose of 0.05uGy/h (1Gy is equal to about 1,000mSV or 1Sv), which is close to the natural radioactive background.
It is now clear that exposure to at least 100mGy (2,000 times the dose of a chest X-ray) of radiation is required to significantly increase a person's risk of developing cancer. Therefore, there is no need for undue health concerns. The various claims about the dangers of radiation, whether true or false, often cause people to panic. Health Headlines would like to use this news story to talk about it, so that people can look at radiation correctly and reduce unnecessary worries.
Radiation can be divided into ionizing radiation and non-ionizing radiation. And for ease of understanding, you can think ------ of high and powerful called ionizing radiation, low and weak called non-ionizing radiation. The so-called "power" here can be simply understood as the ability to ionize matter. Health problems occur when the bonds between atoms and molecules in the body are broken by ionization.