Sachin Walls
Airport security has become increasingly stringent, with full-body scanners, metal detectors, facial recognition, and luggage X-rays. While these measures are essential for safety, they can raise concerns about privacy and health risks. Passengers wonder if body scanners reveal too much, and if the radiation emitted by various machines poses a danger, especially for children, pregnant women, and those with medical devices. Understanding the technology and procedures can alleviate some of these concerns. For instance, while older scanners revealed naked images, newer scanners in the US, Canada, and the EU use millimetre-wave technology, showing a generic human shape without identifying features. These scanners are also safe for pregnant women and those with pacemakers. Passengers with medical devices like Dexom sensors or breast implants should inform TSA agents beforehand for alternative screening methods.
| Characteristics | Values |
|---|---|
| What do airport body scanners see? | Airport body scanners do not show your naked body on the screen. They give a generic image of your body without any specific identifying features. |
| What technology do airport scanners use? | Advanced Imaging Technology (AIT) |
| Are airport scanners safe? | Yes, airport scanners are safe for children, pregnant women, and people with pacemakers. The dose of ionizing radiation emitted by the scanners is very low. |
| What items set off airport scanners? | Metal objects, benign undivested items (items that need to be placed in bins before walking through security checkpoints), electronics larger than a cell phone, and powders in carry-on baggage. |
| Can you opt out of airport body scanners? | In the US, travellers are allowed to refuse a body scanner and opt for a physical search instead. |
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What You'll Learn
Body scanners do not show you naked
Body scanners at the airport are used to ensure safety and prevent prohibited items and other threats to transportation security. They are designed to detect metallic and non-metallic threat items, such as weapons, chemicals, liquids, and explosive materials. While these scanners may capture detailed images of passengers' bodies, they do not show you naked.
In the past, early versions of body scanners at airports did not have privacy protections in place. These scanners produced detailed images of passengers' bodies, resulting in concerns about privacy and violations of basic human rights. However, due to privacy concerns, current technology has implemented safeguards to protect passengers' privacy.
Now, body scanners use Advanced Imaging Technology (AIT) to provide a nondescript avatar image of the human anatomy. This generic human form, similar to a gingerbread man or paper doll, ensures passenger privacy while maintaining security effectiveness. The scanners are programmed to detect potential threat items and alert the TSO accordingly. Passengers can also see the viewing monitor throughout the scanning process, ensuring transparency.
Millimeter-wave scanner software, introduced in 2011, further enhanced privacy by displaying featureless male or female 'cartoons'. These scanners create a generic, cartoon-like outline of a human body, with indicators showing where any suspicious items were detected. This outline is used to ensure privacy while still allowing for effective security screening.
While body scanners do not show you naked, it is important to note that certain items may trigger the scanner, such as thick hair, hair clips, layered clothing, zippers, and buttons. Additionally, perspiration can also set off the scanners due to the way millimeter wave technology interacts with water. If you have any medical devices or other items that may set off the alarm, it is recommended to inform the TSO before entering the scanner.
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You can opt for a physical search instead
If you are uncomfortable with the idea of going through an airport body scanner, you can opt for a physical search instead. This is also known as a "pat-down" or "frisk scan".
Passengers who have been selected for enhanced screening cannot opt out of the full-body scanner, but for everyone else, it is possible to request a physical search. If you are concerned about the radiation emitted by the body scanner, you can ask for a physical search. The radiation dose is very low, but if you would still prefer not to be exposed to it, you can request an alternative screening method.
If you have a Dexcom sensor, you must inform the TSA agent before the security screening so that they can screen you with a pat-down, wand, or visual screening. Similarly, if you have a breast prosthesis, you should inform the TSA agent before entering the scanner, as you may be required to undergo additional security screening. If you have an ostomy pouch, you can go through the full-body scanner, a metal detector, or a pat-down without having to empty or show it to the TSA agent, but you may be required to undergo additional security screening.
It is also possible to opt for a physical search if you are travelling with a baby and would prefer that their food did not go through an x-ray machine or CT scanner. You must inform the TSA agent before the security screening so that they can make alternative arrangements.
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Scanners can detect benign items in pockets
Airport scanners are designed to detect threats and keep passengers safe. These machines can detect benign items in pockets, such as personal electronic devices, metallic and non-metallic objects, and organic materials.
Advanced Imaging Technology (AIT) is used for full-body scans at airport checkpoints. While these scanners do not reveal your naked body on the screen, they can detect benign items that passengers are required to place in bins before walking through security checkpoints. These "benign undivested items" include personal electronic devices, such as laptops, tablets, e-readers, and handheld game consoles. Passengers are instructed to place these devices in a bin for X-ray screening, ensuring they are separate from other carry-on items.
In addition to electronic devices, airport scanners can detect metallic and non-metallic objects, including the smallest amounts of metal. This capability is crucial for identifying potential threats, such as weapons or prohibited items. Scanners can also detect organic materials, which are marked in orange. Examples of organic materials include drugs, food, explosives, and paper. It's important to note that while scanners can detect the presence of these materials, they may not always identify the exact composition.
Airport scanners are also capable of spotting items concealed under clothing. This includes items hidden in pockets, such as drugs or other prohibited substances. While body scanners do not see under the skin, they can detect items stashed in body cavities by identifying visual clues. Additionally, millimeter wave machines use non-ionizing radiofrequency waves to detect threats, including objects that may be hidden under clothing or in pockets.
Overall, while airport scanners are primarily focused on detecting threats, they are sensitive enough to identify a range of benign items in pockets, from electronic devices to metallic objects and organic materials. These capabilities help ensure the safety of passengers and allow for a thorough screening process.
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Scanners can detect metal and non-metal objects
Airport security systems use a variety of methods to ensure the safety of passengers and staff. Metal detectors, backscatter X-ray machines, millimeter wave scanners, and cabinet X-ray machines are all used to detect potential threats.
Metal detectors use non-ionizing radiation to scan for hidden items. This type of radiation has enough energy to move atoms in a molecule or cause them to vibrate, but not enough to remove electrons from atoms. Millimeter wave machines use the same type of radiation, emitting far less energy than a cell phone, to detect threats. They bounce waves off the body and back to the machine, creating an image for TSA agents to review.
Full-body scanners, which began to supplement metal detectors at airports in 2007, can detect non-metal objects, including those hidden in body cavities. Backscatter X-ray scanners use low-dose radiation to detect suspicious metallic and non-metallic objects hidden under clothing, in shoes, or in body cavities. Passive infrared scanners collect and analyze natural heat radiation emitted by the human body to detect metallic and non-metallic "threat objects." They preserve privacy as no body details are revealed.
In addition to these methods, 3D ground scanners can detect both metal and non-metal objects. They use advanced technology to create detailed 3D maps of the subsurface, revealing the location, size, and shape of buried objects. This technology is particularly useful for archaeologists, metal detectorists, treasure hunters, and miners.
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Scanners are safe for pregnant people
Scanners at airports are safe for pregnant people. The Advanced Imaging Technology (AIT) used by the scanners does not emit dangerous rays and is not harmful to pregnant people or their babies. The radiation emitted by the scanners is much lower than the exposure associated with fetal harm. In fact, you are exposed to more radiation during your flight than when walking through the scanners.
While the scanners are safe for pregnant people, some may still prefer to opt for a pat-down instead. This could be due to privacy concerns, as some travelers are uncomfortable with the idea of their naked body being visible to TSA agents. However, it is important to note that the current machines do not show detailed images of naked bodies on their screens. Instead, they display little humanoid avatars.
Additionally, the TSA may have measures in place to minimize the need for pat-downs, especially for children. If you have any medical devices or other items that you think may set off the alarms, it is recommended to inform the TSA officers beforehand.
It is always a good idea to arrive at the airport early, especially if you anticipate needing additional time for security screening. This will help ensure a smooth and stress-free experience.
While some people may have concerns about the safety of airport scanners, the machines are designed with safety in mind, and the TSA works closely with intelligence and law enforcement to maintain the highest levels of transportation security.
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Frequently asked questions
No, airport body scanners do not show your naked body on the screen. They provide a generic image of your body, without any specific identifying features.
Airport body scanners are looking for prohibited items and other threats to transportation security. They can detect metal and non-metal objects that may be concealed under clothing.
Yes, in the US, travellers are allowed to refuse to go through the body scanner and opt for a physical search instead. However, passengers who have been selected for enhanced screening cannot opt out of the full-body scanner.
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