A 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. Unlike metal detectors, full-body scanners can detect non-metal objects, which became an increasing concern after various airliner bombing attempts in the 2000s. Some scanners can also detect swallowed items or hidden in body cavities of a person. Starting in 2007, full-body scanners started supplementing metal detectors at airports and train stations in many countries.

Passengers and advocates have objected to images of their naked bodies being displayed to screening agents or recorded by the government. Critics have called the imaging virtual strip searches without probable cause, and have suggested they are illegal and violate basic human rights.[4] However, current technology is less intrusive and because of privacy issues most people are allowed to refuse this scan and opt for a traditional pat-down. Depending on the technology used, the operator may see an alternate-wavelength image of the person's naked body, merely a cartoon-like representation of the person with an indicator showing where any suspicious items were detected, or full X-ray image of the person. For privacy and security reasons, the display is generally not visible to other passengers, and in some cases is located in a separate room where the operator cannot see the face of the person being screened. Transmission X-ray scanners claim to be more privacy neutral as there is almost no way to distinguish a person but they also have a software able to hide privacy issues.


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The first (ultra-low-dose backscatter X-ray) full body security scanner was developed by Dr. Steven W Smith,[5][6] who developed the Secure 1000 whole body scanner in 1992. He subsequently sold the device and associated patents to Rapiscan Systems, who now manufacture and distribute the device.

In 2000,[3] Dr. Vladimir Linev patented a system for scanning a person based on transmission (penetrating) X-ray technology focused on the search for unwanted objects and contraband, which was later the base for CONPASS body scanner.

The first millimeter-wave full body scanner was developed at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington. The operation is one of the four national laboratories Battelle manages for the U.S. Department of Energy. In the 1990s, they patented their 3-D holographic-imagery technology, with research and development support provided by the TSA and the Federal Aviation Administration (FAA).[8] In 2002, Silicon Valley startup SafeView, Inc. obtained an exclusive license to PNNL's (background) intellectual property, to commercialize their technology.[9] From 2002 to 2006, SafeView developed a production-ready millimeter body scanner system, and software which included scanner control, algorithms for threat detection and object recognition, as well as techniques to conceal raw images in order to resolve privacy concerns. During this time, SafeView developed foreground IP through several patent applications. By 2006, SafeView's body scanning portals had been installed and trialed at various locations around the globe. They were installed at border crossings in Israel, international airports such as Mexico City and Amsterdam's Schiphol, ferry landings in Singapore, railway stations in the UK, government buildings like The Hague, and commercial buildings in Tokyo. They were also employed to secure soldiers and workers in Iraq's Green Zone. In 2006, SafeView was acquired by L-3 Communications.[10][11] From 2006 and 2020, L-3 Communications (later L3Harris) continued to make incremental enhancements to their scanner systems, while deploying thousands of units worldwide. In 2020, Leidos acquired L3Harris, which included their body scanner business unit.[12]

The first passive, non-radiating full body screening camera device was developed by Lockheed Martin through a sponsorship by the National Institute of Justice (NIJ)'s Office of Science and Technology and the United States Air Force Research Laboratory. Proof of concept was conducted in 1995 through the Defense Advanced Research Projects Agency (DARPA). Rights to this technology were subsequently acquired by Brijot Imaging Systems, who further matured a commercial-grade product line and now manufacture, market and support the passive millimeter wave camera devices.[13]

Schiphol in the Netherlands was the first airport in the world to implement SafeView's millimeter-wave body scanner on a large scale after a test with flight personnel the previous year. On May 15, 2007, two of 17 purchased security scans were installed.

The Italian government had planned to install full-body scanners at all airport and train stations throughout the country, but announced in September 2010 plans to remove the scanners from airports, calling them "slow and ineffective".[14]

It is for each member state to decide to authorise the use of scanners in national airports. That will not change ... But where this scanning technology is used it should be covered by EU-wide standards on detection capability as well as common safeguards to ensure compliance with EU health and fundamental rights provisions.

In Canada, 24 airports currently have these scanners in use, using millimeter-wave technology. Transport Canada notes that "Passengers selected for a secondary search can choose between the full body scanner or a physical search."[24][25]

After having previously used X-ray-based scanners the TSA currently uses Millimeter Wave AIT scanners exclusively, which show no identifying characteristics of the person being scanned. Instead, a generic outline of a person is used.[28] As of December 2015, "While passengers may generally decline AIT screening in favor of physical screening, TSA may direct mandatory AIT screening for some passengers as warranted by security considerations in order to safeguard transportation security."[29]

Regarding privacy concerns the Transportation Security Administration (TSA) has stated in 2010 that they "[have] not, will not and the machines cannot store images of passengers at airports".[30] However the TSA later disclosed, in a response to the house chair on homeland security, that its procurement of airport scanners requires manufacturers to include image storage and transmission features but that these features should be disabled before being placed in an airport. The TSA shows 45 individuals have the ability to turn these machines into 'test mode' which enables recording images, but states that they would never do this on a production system.[31] The US Marshal Service did operate a backscatter machine in a courthouse that records images. However, in a statement, they noted that only individuals involved in a test were recorded. A sample of these images was received and disseminated by Gizmodo in 2010, using a Freedom Of Information Request.[32] It is not clear if the US Marshal service has put these new scanning machines, that have recording capabilities, into production. The analyst is in a different room and is not supposed to be able to see the person being scanned by the Backscatter X-ray AIT, but is in contact with other officials who can halt the scanned person if anything suspicious shows up on the scan.

US Penitentiary is also constantly purchasing[33] X-ray full-body scanners for contraband and weapons detection purposes. The scanners are generally Transmission X-ray scanners since these are the only devices capable of detecting metallic and non-metallic contraband hidden underneath clothing as well as contraband hidden inside body cavities.[34]

Passive infra-red scanners have been developed for use in public spaces to collect and analyze natural heat radiation given off by the human body to detect both metallic and non-metallic "threat objects". No external radiation source is used and privacy is preserved as no body details are revealed. Police are conducting a trial of the equipment at London rail stations.[36][37]

Full-body scanning allows screeners to see the surface of the skin under clothing.[42] Prosthetics including breast prostheses and prosthetic testicles may require a potentially embarrassing physical inspection once detected. The scanners can also detect other medical equipment normally hidden, such as colostomy bags and catheters.[43] The transgender community also has privacy concerns[44] that body scanners could lead to their harassment.

Opponents in the US argue that full body scanners and the new TSA patdowns are unconstitutional.[48] A comprehensive student note came out in the Fall 2010 issue of the University of Denver Transportation Law Journal arguing that full-body scanners are unconstitutional in the United States because they are (1) too invasive and (2) not effective enough because the process is too inefficient.[49]

EPIC claimed at that time that full-body scanners violated the Fourth Amendment to the United States Constitution because they subject citizens to a virtual strip search without any evidence of wrongdoing.[51] In July 2011, the United States Court of Appeals for the District of Columbia Circuit ruled that the use of full body scanners at airport security does not violate the Fourth Amendment.[52]

The American Civil Liberties Union, in 2006, called the machines an invasion of privacy: "This doesn't only concern genitals but body size, body shape and other things like evidence of mastectomies, colostomy appliances or catheter tubes. These are very personal things that people have every right to keep private and personal, aside from the modesty consideration of not wanting to be naked."[53]

In November 2010, a female traveler who opted out of a full body scan at Fort Lauderdale International Airport claimed that TSA agents handcuffed her to a chair and ripped up her plane ticket when she asked questions about the new type of invasive pat down she was about to receive.[62] In response, the TSA posted parts of the security camera footage on their blog, though there is no sound in the video and the passenger is not directly in the camera during most of the incident.[63] 17dc91bb1f

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