Defense Technologies International Corp (DTII)

[Handyman4545]

"how is that better [than] current X-ray?"

First off. Better is not the point.
"Better" is just a sales term.
The point is this is the competition.
Is it safer, as safe or less safe is dependant on the use and the place where it's used.

microwaves range 1 GHz to 30 GHz
The PATSCAN™ CMR: Cognitive Microwave Radar
Frequency range: from 500 MHz to 5 GHz (microwave freq. range).
That puts the PATSCAN at less than MMW

If I'm not mistaken, Offender Alert uses electromagnetic field technology (EMF) for detection.

Millimeter waves from 30 GHz to 300 GHz.
Millimeter wave, which is also known as extremely high frequency (EHF) or very high frequency (VHF) by the International Telecommunications Union (ITU), can be used for high-speed wireless broadband communications. Millimeter wave is an undeveloped band of spectrum that can be used in a broad range of products and services like high speed, point-to-point wireless local area networks (WLANs) and broadband access. In telecommunications, millimeter wave is used for a variety of services on mobile and wireless networks, as it allows for higher data rates up to 10 Gbps.

Millimeter Wave Scanner (MMW)
A millimeter wave scanner is a whole-body imaging device used for detecting objects concealed underneath a person’s clothing using a form of electromagnetic radiation. Typical uses for this technology include detection of items for commercial loss prevention, smuggling and screening at government buildings and airport security checkpoints. Several countries employ the scanners for security screening.

It is one of the common technologies of full body scanner used for body imaging; a competing technology is backscatter X-ray. Millimeter wave scanners themselves come in two varieties: active and passive. Active scanners direct millimeter wave energy at the subject and then interpret the reflected energy. Passive systems create images using only ambient radiation and radiation emitted from the human body or objects.

Backscatter X-Ray
Range 30 petahertz to 30 exahertz (Less than a MHz)
Backscatter X-ray is an advanced X-ray imaging technology. Traditional X-ray machines detect hard and soft materials by the variation in x-ray intensity transmitted through the target. In contrast, backscatter X-ray detects the radiation that reflects from the target. It has potential applications where less-destructive examination is required, and can operate even if only one side of the target is available for examination.

Electromagnetic (EM) Spectrum
The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays. Frequency determines the type.

Since 2007, TSA piloted state-of-the-art advanced imaging technologies that can detect a wide range of threats to transportation security in a matter of seconds at airports across the country to protect passengers and crews. This imaging technology is an integral part of TSA's effort to continually look for new technologies that help ensure travel remains safe and secure by staying ahead of evolving threats.

TSA
Currently, there are 40 millimeter wave imaging technology units in use at 19 airports. Six machines are used as primary screening at six airports and 34 machines are used for secondary, or random screening, as an alternative to a pat down at 13 airports.

TSA has tested both millimeter wave and backscatter imaging and announced that it plans to purchase an additional 150 backscatter units.
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