Los Angeles is the first city in the nation to roll out body scanners to protect passengers.The software generates generic avatars and creates either a black spot on the area of the body where the item is concealed or overlays a color indicator. .
The technology does not emit radiation of any kind and no anatomical details are displayed." The body scanners are high-security devices designed to screen passengers for improvised explosive devices or other weapons that could be intended to cause mass-casualty attacks.
From 30 feet away, the devices can scan more than 2,000 passengers an hour and spot items such as concealed weapons and suicide vests.
More of the devices will be rolled out across the transit system, though officials did not provide specific dates.