![]() Three distinct technologies have been used in practice: Starting in 2007, full-body scanners started supplementing metal detectors at airports and train stations in many countries. Unlike metal detectors, full-body scanners can detect non-metal objects, which became an increasing concern after various airliner bombing attempts in the 2000s and some scanners can also detect swallowed items or hidden in body cavities of a person. Image from an active millimeter wave body scannerĪ full-body scanner is a device that detects objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact.
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