Security check is a very common security measure in modern society, and it is the basic guarantee for passengers' personal and property safety. Subway, station and airport security checks are experiences that almost every traveler has experienced. X-ray baggage scanners or other X-ray baggage scanning equipment are often used in the security check process. Because this equipment uses X-rays, and the public is overly afraid of the characteristics of X-ray ionizing radiation, the black hole behind the lead curtain is constantly swallowing A sense of security for people, especially for professionals who travel a lot due to professional demands. So, is the security check really safe? What kind of impact will it have?

The working principle of X Ray Scanner Machine at stations and airports is the same as that of medical X-ray diagnostic equipment. They all use X-rays to irradiate the detected object to obtain images, and then help staff identify the content of the images. X-rays have a strong penetrating ability, and the imaging results are different according to the density of the material. Objects with low density, such as human muscle tissue, internal organs, etc., have weak absorption of X-rays, so the attenuation of X-rays after passing through the human body is small, and the intensity of X-rays passing through objects is relatively high. Objects with high density, such as bones and lead plates, have stronger absorption of X-rays and greater attenuation, and the intensity of X-rays passing through the object is relatively small. When photosensitive materials, such as X-ray film, are placed behind the object, due to the different intensity of X-rays passing through the human body in different areas, different shades of black will appear on the film, that is, the color contrast of different areas is different. In this way, the structure of the object can be judged through the image on the X-ray film.

However, baggage security inspection equipment cannot be completely equivalent to medical X-ray inspection equipment. We know that whether it is toxic substances or ionizing radiation, the size of any damage is related to the dose, and it is meaningless to talk about damage regardless of the dose. The radiation dose of luggage security inspection equipment is far less than that of medical X-ray diagnostic equipment, because the security inspection of luggage does not need to reach the resolution of medical diagnosis level, but only needs to reach the level of distinguishing the shape of objects to identify whether it is safe or not.

According to relevant newspaper reports, the radiation dose of the luggage security inspection instrument is about 1% of that of the medical X-ray imager, and since the luggage security inspection instrument is shielded with a certain thickness of lead curtains on all sides, the radiation dose on the outer surface of the security inspection instrument can be reduced by about two times. order of magnitude. The radiation dose received by a full-body security check is about one-fifth of that of an X-ray film, and the impact is very small. Therefore, even people who travel frequently will not be exposed to too much radiation. In fact, even the security staff is very safe.

Of course, in order to better protect yourself and minimize X-ray radiation, there are still many ways. For example, reduce the time spent staying around the security checker, stay away from the exit of the security checker, and never reach in to pick up your luggage before it comes out. No matter how rushed, safety is the most important thing.