And continuously release low-level radiation. However, according to toxicologists, people did not enter their offices and were worried about the renovation of the kitchen. On the contrary, there is only one source of excessive anxiety: airport security scanners. The concerns of patients with "KDSP" and "KDSP" are usually based on the warnings issued by health care providers about medical X-rays. The US Food and Drug Administration warned that patients should receive X-ray imaging only when absolutely necessary. But should people also pay attention to the security scanner at the airport? Dr. Lewis Nelson, professor and chairman of emergency medicine at Rutgers New Jersey Medical College, said that five radioactive daily necessities
Fortunately, for health-conscious regulars, there is no need to worry. Radiation is a general term for different kinds of mobile electromagnetic energy: ionizing radiation (radiation emitted by X-ray machines) and non-ionizing radiation (including radio waves and electromagnetic waves). The key difference between ionizing radiation and non-ionizing radiation lies in the energy level they transmit. Ionizing radiation has enough energy to blow electrons away from atoms and produce free radicals; These chemically reactive particles will destroy DNA and increase people's risk of cancer.
But ionizing radiation will really affect our health only at high doses. Nielsen said that although about half of the X-ray machines in the airport emit ionizing radiation, the dose is not enough to cause harm to the human body. About half of the scanners use millimeter waves, which are non-ionizing radiation. )
"It's too small to matter," he told Life Science.
Although patients may be worried about the amount of medical X-rays they receive, the radiation of airport X-rays is relatively small. Chest X-rays expose patients to radiation about 1000 times that of airport scanners. The Institute of Health Physics estimates that the airport X-ray scanner can provide radiation of 0. 1 microsievert per scan. In contrast, according to a study published in the journal Radiology in 2008, a typical chest X-ray can provide 100 microsieverts of radiation.
Nelson said that passengers were exposed to more radiation during the flight. The amount of radiation emitted by the plane per minute is roughly the same as that emitted by the airport X-ray scanning.
Nelson said: "Ironically, people who are afraid of radiation exposure during the screening process have no doubt about boarding the plane."
The amount of radiation emitted by these scanners is very small. Even if you fly every day, according to the dose estimation of NASA, you can only absorb a small amount of ionizing radiation from food in one year.
According to NASA data, most foods contain a small amount of radioactive molecules carbon-14 and potassium -40. Nelson said that in fact, many objects and substances we encounter every day emit radiation; Soil, concrete sidewalks and buildings, and even the air we breathe have slight radiation.
Compared with all these radiations, the radiation emitted by the X-ray scanner is negligible. The same is true for those who are exposed to more radiation, such as pregnant women and babies, who receive the same amount of background radiation every day. "KDSP" "KDSP" "Dose produces poison", Roy Nelson said. "The dose is enough, everything is poisonous." If your dosage is low enough, everything is non-toxic. "KdSPE" Roy Nelson added that the airport X-ray finally landed at the non-toxic end of the spectrum. Five strange things about "kdspe", you don't know five reasons for Chernobyl: radiotherapy is never safe. What are gamma rays? "
"Originally published in Life Science."