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The process, which takes about seven seconds, produces a generic image of an individual that shows no anatomical details. The images differ from those produced by backscatter X-ray scans that produce a virtually nude image of a subject and have been widely criticized by privacy advocates.

The TSA also plans to set up hardware that would enable passengers the opportunity to see the image at the same time as the screener. A person who passes the screening test would see a green screen on a monitor. Those who fail would see a red band on the screen and an animated image showing where metal objects are hidden.

These are actually the same-nude-o-scopes with different software, and as posters to TS&S have pointed out there's no guarantee the original nude image doesn't get saved or viewed somewhere.