WASHINGTON – The US is replacing full-body scanners deployed at some major airports that have been criticized for triggering potential health risks and privacy violations with a new type of machine that is faster and not too intrusive. The Transportation Security Administration (TSA) operates more than 700 body scanners at about 180 airports across the country.
TSA officials say the millimeter wave machines are being moved into high-traffic airports like Los Angeles International because they can screen each passenger in about 10 seconds. The backscatter scanner can take up to a minute. The machines were introduced at American airports after a Nigerian national tried to blow up a US airliner near Detroit with explosives hidden in his underwear on December 25, 2009.
About half of those scanners employ “backscatter” technology that uses low-level X-rays to create what resembles a nude image of passengers to detect weapons. The faster scanners use low-level radio waves, or millimetre waves, and instead use a generic avatar figure to show hidden objects, the Los Angeles Times reported.
The backscatter machines have been criticized by academics and privacy advocates who say the radiation they emit poses a health risk and the images they create violate the privacy of passengers.
Torrance-based Rapiscan Systems Inc., the makers of the backscatter machines, declined to comment, the paper said.
