A new security screener that people can simply walk past may soon be coming to an airport near you. Last year, U.S. airports nationwide began adopting HEXWAVE, a commercialized system based on microwave imaging technology developed at MIT Lincoln Laboratory. HEXWAVE addresses a new Transportation Security Administration (TSA) mandate for enhanced employee screening to detect metallic and nonmetallic threats. The TSA is now evaluating HEXWAVE as a potential replacement for metal detectors to screen precheck passengers.

Typically, when you arrive at an airport security checkpoint line, you place your carry-on items on the conveyor belt, remove your shoes and any metallic items, and enter a body scanner. As you hold still for a few seconds with your feet spread apart and your arms extended over your head, the scanner creates a generic, featureless 3D body outline revealing any metallic or nonmetallic concealed weapons or other prohibited items.

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