For a typical cross-country flight in a commercial airplane, you are likely to receive 2 to 5 millirem (mrem) of radiation, less than half the radiation dose you receive from a chest x-ray. People in the United States receive an average of 360 mrem of radiation per year from natural and man-made radiation sources, which includes cosmic radiation exposure during commercial flights.
The full-body scanners that used X-rays to create what look like nude images of passengers have been packed away and removed from airports across the country.
The TSA now relies solely on millimeter-wave scanners, which previously generated similar nude images but have been upgraded to portray a generic figure on which they point out objects concealed on travelers' bodies.
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