Early versions of security machines at airports showed images of people as if they had no clothes on, which sparked privacy concerns.

American Science & Engineering Inc. has just launched an X-ray machine that can see objects hidden beneath clothing of passengers while obscuring private parts.
SmartCheck, creates an outline of the person’s body, along with an outline of hidden items.

Another manufacturer, Rapiscan Systems has come up with a sliding scale where the image starts to get fuzzier or more precise as needed. The companies promise that the people who screen the X-rays would sit in a remote room where they can’t see the passengers. The screeners would all be of the same sex as the travelers and images won’t be saved.

Via The Wall Street Journal.
Airport stories: sweating at airport?, underwear for airport searches.