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Your Thanksgiving escape to Grandma ’s house now includes a full - body social disease of go - ray radiation from the new surety scanners at many airports . You ’ll also be dispatch with a full-blooded serving of cosmic rays during your trajectory . But is it enough to make you shine light-green ?
Although the amount of radiation sickness engage during a flight depends on the plane ’s altitude and parallel of latitude and the current solar activity and weather conditions , the distinctive New York City - to - Los Angeles trip in a commercial airplane exposes a person to about 2 to 5 millirem ( mrem ) less than half the STD received from a chest XTC - beam ( 10 mrem ) , according to the U.S Environmental Protection Agency . Rems are a measure of the biological burden from exposure to radiotherapy .
A raw X-ray backscatter image, shown here before the privacy algorithm to obscure identifying features has been applied, can identify weapons or explosives.
To put this in position , the U.S. Nuclear Regulatory Commission estimates that the average American take in 620 mrem a year . About half of that annual dose comes from natural " background radiation " forever present in the environment and raining on us from stunned infinite . Higher elevations arehit with more cosmic raysbecause there is less ambiance above them to deflect the constant blow of backdrop radiation . Similarly , fly in a plane exposes people to a higher dose of irradiation than if they ’d traveled by car .
The backscatter X - shaft of light applied science being introduced at Transportation Security Administrationstations in airport across the country give off a back breaker of 10 microrem ( mcg ) , or 0.001 mrem , according to the TSA . So while you ’re in the plane that ’s flying hybrid - rural area , you ’re receiving between 2,000 and 5,000 times as much cosmic radiation as you were subjectedto in fiat to board the planing machine . Even if you combine those two doses , it is only about1/200thof what you commonly receive in a twelvemonth .
According to Food and Drug Administration standards , noindividual who is scanned before flight is allowed to receive more than 25 mrem in a 12 - calendar month period . But there ’s little chance anyone , even a fender , would reach that doorway : Doing so would take 25,000 scansin one year .
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However , some researcher argue that a individual backscatter XTC - ray of light scan pay a person a tumid dose than the TSA claims .
David Brenner , chairman of the department of medicine at Columbia University , discuss the topic at the Congressional Biomedical Research Caucus when the TSA commence rolling outbackscatter technology in airdrome . Brenner said the dose released by the scan is indeed pocket-size , but not as small as TSA would have us believe .
The turn given is what the whole body receives on average . However , the whole physical structure is n’t actually receive the radiotherapy exposure . The tegument on the scalp incur 20 times the medium dose that is typically quoted by TSA and throughout the manufacture . It ’s still a low dose , but it ’s much more than what ’s usually said .
Those worried about the 0.001 mrem that a person receive from backscatter airport security scan each direction on a round - misstep should deal that a person who smoke five cigarettes a sidereal day inhales about 1,325 mrem a year more than half theradiation amount absorbedduring a CAT scan , according to the office of Health , Safety and Security .
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