How much radiation security equipment, security equipment, baggage screening machines, screening machine, X-ray machines

Radiation subway, railway station, airport security equipment is "wounded man"? We must be clear:

● security door staff through the metal detectors, rather than X-ray equipment, inspection of goods is the use of X-rays.

● From the data, the value of the background radiation screening machine with a standard dose of radiation leaking natural environment close to the sidelines after no radiation danger.

Recently, the media reported that the Shenzhen Metro-ray screening machine may leak there, then, part of the Shenzhen Metro suspended screening machine, the provincial Department of Environmental Protection has issued a document calling on the province to carry out environmental law enforcement inspection ray device. Aftermath is not broken, there are still many people worried about their security machine has been exposed to, whether suffered nuclear radiation? Pregnant women are more worried about whether the abdominal screening machine will hurt the baby? Sun Yat-sen Memorial Hospital, director of nuclear medicine, nuclear medicine physicians branch vice president of the Chinese Medical Association, said Professor Jiang Ningyi, "radiation" daunting, in fact, radiation is everywhere, and people's lives, "it can be said , accompanied by a ray of human evolution. "

Eighty percent from natural radiation

Professor Jiang Ningyi introduced the "radiation" including natural radiation and man-made radiation, 80% of human exposure from natural radiation, including cosmic rays, radon, a naturally occurring substance in the ordinary nature of radioactive radiation in outer space. We surrounding soil, air, houses, ocean, rivers, grain, vegetables and drinking water, etc., contain trace amounts of radionuclides.

The remaining 20% of man-made radiation, of which the most important is the medical radiation, the hospital's radiology, nuclear medicine, radiotherapy department will use the "radiation" diagnosis and treatment of disease. In addition, there are also testing the use of "radiation" on the principle of industrial radiation breeding in agriculture, daily radiation sterilization, nuclear industry and so on, are all using radiation to improve the quality of life initiative. In short, as long as the rational use of radiation is safe, can benefit mankind. "Radiation" is really too hazardous to health, but its precondition is overexposure.

Medical screening is much lower than the amount of radiation X devices

Subway, railway station, airport security equipment, is a device to detect objects, the type many, the most common is the channel X-ray machine. Objects obtained through the X ray machine image, the image and then processed by a computer, on a computer screen, you can identify the object image and assess safety. Professor Jiang Ningyi introduced the Road, "It's like the human body to the hospital for X examination, but the X-dose medical X-ray machine is much higher than the equipment, the amount of current medical chest tube machine is 50 times the security machine."

Security inside the studio must have a certain dose of X-rays, but the only things into our luggage to check, will not enter the human body and, therefore, not be exposed to radiation. According to media reports, the recent Guangdong Provincial Environmental Protection Bureau Director Li Qing portal also accept online interview responses, security airports, train stations, subways and other public places for people and goods separately, through the security gate staff metal detectors, rather than X-ray equipment, inspection of goods is the use of X-rays, and therefore is not subject to staff through security X-ray irradiation.

So, people from the next X-ray equipment to detect objects through, it will not be subject to radiation? Professor Jiang Ningyi think, in general, after a security inspection of the machine does not have such a possibility, it should be safe. From the data, the standard ray screening machine leaking radioactive dose and natural background values close. According to media reports, when the Guangdong Provincial Environmental Protection Bureau Director Li Qing is also the site interview, also said the relevant technical report in accordance with the United Nations, in the vicinity of X-ray machine to stay five hours, was the equivalent of a medical chest X-ray, it will not impact on the health of the surrounding population.

Medical X examination hurt

Well, since the medical device X X doses far higher than the screening machine, then do the medical examination had been "shot suffer" dangerous? Professor Jiang Ningyi said radiation on the human body is affected, depending on the amount of radiation a subject, by the amount of radiation by the irradiation time, and the body of the radiation regulation.

Justification, optimization and dose limiting exposure to radiation: Medical-ray irradiation using a basic principle. For that patients need to be treated before taking irradiation examination and treatment, radiation treatment of choice is the most superior technology and equipment, hospital radiologists are "Ray" professionals and ensure that patient safety within the scope of certain restrictions accept a small amount of radiation, so there is no need for this patient psychological burden.

Hot Spot Analysis

The key point of the "Shenzhen subway security machine" events surrounding the dispute is whether the ray screening machine leaks. There are reports that workers in Shenzhen Nuclear and Radiation Management Center has done testing, screening machine in the machine side of the machine away from the surface of 5 to 10 cm, the data using a handheld instrument detects the staff get is 0.1 ~ 0.2μSv / h (ray radiation dose rate units).

Professor Jiang Ningyi analyzed, the value of this data and the natural radiation environment measured almost, that is, the side of the machine basically does not exist radiation leak.

According to media reports, the staff again into the machine luggage detector entrance about 10 cm, where the measured value of 0.7 ~ 0.8μSv / h. Therefore, the amount of radiation leaks baggage screening machines of the highest entrance, the farther away from the screening machine, the smaller the amount of radiation leakage.

Professor Jiang Ningyi analysis Road, (GB18871-2002) shall be calculated according to China's "Ionizing Radiation Protection and Safety of Radiation Sources basic standards," a man standing screening machine at the entrance about 10 cm 52 days without moving, will achieve a year limit the amount. Therefore, the value of this radiation is actually very low, not enough to cause radiation damage to the human body. After screening machines when pregnant nor will it affect the abdominal baby, do not worry and panic.

How much radiation security equipment, security equipment, baggage screening machines, screening machine, X-ray machines