Phoenix Sky Harbor International Airport in the US has begun using full-body scanners for passenger screening.
Backscatter machines developed by Rapiscan Systems use low-level X-ray beams to create a two-dimensional image of the passenger's body, according to the Associated Press.
It will take just five to ten seconds to screen passengers, making it more convenient than traditional hands-on models.
The chalk-like images produced from the scanner will not be saved, printed or retrieved, maintaining privacy of passengers.
The airport, which began using the device as a primary form of screening last week in Terminal Four, is expected to receive ten to 30 machines by the end of 2010.
The US Transportation Security Administration has installed 113 backscatters at 32 airports in the US, and has plans to install additional 450 machines by the end of 2010.