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Full Body Scanner

From Wikipedia, the free encyclopedia
 

A full-body scanner is a device that creates an image of a person's nude body through their clothing to look for hidden objects without physically removing their clothes or making physical contact. They are increasingly being deployed at airports and train stations in many countries.

One technology used under the name "full-body scanner" is the millimeter wave scanner, the active form of which reflects extremely high frequency radio waves off the body to make an image on which one can see some types of objects hidden under the clothes. Passive millimeter wave screening devices rely on only the raw energy that is naturally emitted from the human body or objects concealed on the body; passive devices do not transmit millimeter waves.[1][2] Another technology in use is the backscatter X-ray.

Two advantages of full-body scanners over a physical strip search are that it is quicker (takes only 15 seconds) and that people do not have to be touched in a manner that some might consider offensive. A disadvantage is that the scanners are being used to perform routine, virtual strip searches without probable cause which opponents claim are illegal and violate basic human rights. Furthermore, the true long-term health effects of the active, radiating technologies are unknown. Passive millimeter wave screening is known to be safe because its technology does not require radiating the subject.[1][2]

 

Source: http://en.wikipedia.org/wiki/Full_body_scanner

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