Ruth Haines
Airport body scanners use advanced imaging technology to detect a wide range of metallic and non-metallic objects. While this technology is highly effective, it can sometimes be triggered by benign factors, such as sweat, tissue packets, or clothing with sequins and glitter. In rare cases, medical conditions like cysts, hernias, or other skin lesions may also cause a person to be flagged for additional screening. Trans individuals, obese people, and individuals with scar tissue or wet clothing may also be more likely to trigger the scanners due to the technology's reliance on sexed models. Understanding the potential causes of scanner activation can help travelers anticipate and navigate the security screening process more smoothly.
| Characteristics | Values |
|---|---|
| Reason for glowing chest at airport scanners | Large cysts or masses |
| Metallic and non-metallic items | |
| Radioactive material from recent nuclear medicine exams | |
| Sweat | |
| Tissue packets | |
| Tumors or growths (unlikely) | |
| Health risk | Increased cancer risk |
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What You'll Learn
Airport scanners detect metallic and non-metallic items
Airport scanners are designed to detect metallic and non-metallic items on people's bodies and in their luggage. They are an essential part of airport security, helping to identify potential threats and contraband items. These scanners use advanced imaging and detection technologies, including X-ray scanners, 3D imaging, and millimeter-wave scanners, to ensure thorough security checks.
X-ray scanners are commonly used for luggage and carry-on items. They produce images that reveal the density and composition of materials inside bags, enabling security personnel to differentiate between harmless items and potential threats. X-ray scanners are highly effective at detecting metal objects due to their distinct appearance in X-ray images. Even small parts of firearms, such as screws or springs, can be identified through these scanners.
Millimeter-wave scanners, on the other hand, are often used for scanning individuals. These scanners emit low-energy, non-ionizing radiofrequency waves that pass through clothing, allowing for the detection of hidden objects without physical contact. They can identify both metallic and non-metallic items, including weapons, explosives, and drugs concealed under clothing. The non-invasive nature of millimeter-wave scanners makes them suitable for large-scale use in airports.
Additionally, airport scanners can detect organic materials such as drugs, food, explosives, and paper. They can also identify pills, whether in solid or liquid form, and hidden in luggage or swallowed by passengers. Scanners can also flag liquids, gels, and aerosols that exceed certain volume limits, as well as powder substances that may be used for dangerous purposes.
While airport scanners are highly advanced, they can sometimes be triggered by unusual physiological characteristics. For example, individuals with common skin cysts or hernias may be flagged for additional screening due to the appearance of solid masses on the scanner images. In such cases, carrying a doctor's note explaining the condition can be helpful.
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Radiation exposure is higher during the flight than at security
While it may be surprising, the radiation doses passengers receive from airport security procedures are trivial. The major source of radiation exposure from air travel comes from the flight itself. This is because the higher the altitude, the thinner the air, and the fewer the molecules to deflect incoming cosmic rays. This radiation, also known as galactic radiation, is produced by stars, including our sun, and is constantly bombarding the Earth. The Earth's atmosphere shields us from this radiation, but at higher altitudes, there is less atmospheric protection, resulting in increased radiation exposure.
The radiation dose rate at a typical commercial airline flight altitude of 35,000 feet is about 0.003 millisieverts per hour. The longer the flight time, the higher the accumulated radiation dose. For example, an individual with 18,000,000 miles of air travel would have spent approximately 32,727 hours in the air, resulting in a radiation dose of about 100 mSv. This is equivalent to the radiation exposure from about 1,000 chest x-rays.
While the primary health threat associated with high radiation doses is an increased risk of cancer later in life, it's important to note that the actual risk of radiation harm from flying is low. Studies have shown that the risk of dying from cancer due to radiation exposure during high-altitude flight is very small, increasing the baseline risk by a negligible amount. Additionally, the risk is lower for elderly individuals as death from various causes is more likely to occur before radiation-induced cancer develops.
It is worth mentioning that airport scanners can detect solid masses or large cysts on a person's body, which may lead to further investigation or a pat-down. However, the radiation exposure from these scanners is minimal compared to the exposure during the flight itself. Overall, while air travel does increase radiation exposure, the health risks associated with this exposure are relatively low, and the benefits of air travel often outweigh the potential risks.
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Large skin cysts can cause a security threat
Dr. David Brenner, a radiology researcher at Columbia University Medical Center in New York, agrees that while smaller cysts shouldn't confuse airport scanners, it's more likely that travelers would be flagged when they have larger ones. He suggests that individuals with large cysts (greater than 2 inches) under their clothes obtain a doctor's note before traveling but also mentions that they might still have to undergo a pat-down.
In recent years, many larger airports have replaced X-rays with machines that use radio frequencies to detect suspicious items on travelers. Due to this, a traveler with a bulge in their body from a cyst or hernia might get flagged for an invasive airport security screening to look for explosives. One female traveler with a common type of skin cyst was flagged for a hidden explosive search at a U.S. airport, as noted by her physician, Dr. Warren Heymann.
To avoid such situations, Dr. Heymann suggests that individuals with prominent skin lesions be aware that they might be flagged for additional screening. Carrying a letter from a physician explaining the presence of a cyst, hernia, or other lesions can be helpful, but security personnel may still perform a pat-down and a swipe for contraband.
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Tumors or growths are not detected by airport scanners
It is important to note that tumors or growths are not detected by airport scanners. The scanners are not designed to identify such medical conditions and do not possess that level of detail. However, it is possible for certain medical conditions or the presence of specific items to trigger alerts during security screening at airports. This is because some medical issues can resemble suspicious items or prohibited objects. For example, individuals with skin cysts, prominent lesions, or hernias may be flagged for additional screening due to the unusual appearance of these conditions. In such cases, having a doctor's note explaining the medical condition can be helpful and prevent any potential misunderstandings.
Airport scanners primarily focus on detecting items that may pose a security threat, such as weapons, explosives, or other prohibited items. The scanners use advanced technology, including millimeter-wave or backscatter X-ray technology, to create images that reveal potential threats. These scanners are designed to detect abnormal items or substances, which may include certain medical devices or unusual bodily characteristics.
While tumors or growths themselves are not detectable by airport scanners, individuals with certain medical conditions may still encounter additional screening procedures. This is because some medical devices or treatments can trigger alarms. For instance, individuals who have recently undergone nuclear medicine exams involving radioactive materials may be flagged for additional screening if they travel soon after their procedures. The radiation emitted by these materials can be detected by sensitive airport scanners, leading to further inspections.
It is important to emphasize that the primary goal of airport security is to ensure the safety of passengers and staff. While tumors or growths are not within the scope of detection, airport scanners play a crucial role in identifying potential threats. The technology used in these scanners is continually evolving to enhance detection capabilities while minimizing any potential health risks associated with radiation exposure during screening.
In summary, tumors or growths are not detectable by airport scanners, but certain medical conditions or the presence of specific items may trigger additional screening procedures. Airport security measures are in place to protect travelers and staff, and it is always advisable to be prepared and carry relevant medical documentation when traveling, especially if one has a condition that might raise flags during security screening. Being proactive and informed can help ensure a smoother travel experience and prevent any unnecessary delays or concerns.
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A pat-down may be required after a body scan
Airport body scanners can detect a wide range of metallic and non-metallic items on a person's body and/or in their clothing. If a person has a large cyst or mass that protrudes from the skin, the scanner may flag this as a potential threat. In this case, a pat-down may be required after the body scan to determine the nature of the flagged area.
In some cases, airport scanners may detect solid masses or protrusions that are not dangerous but may require further inspection. For example, a woman with a common type of skin cyst was flagged for a hidden explosive search at a U.S. airport. In another case, a man with a hernia had a protrusion in his groin area that alarmed screeners, resulting in a genital exam. While these situations may be rare, they highlight the potential for airport scanners to identify areas that require further investigation through a pat-down.
It is important to note that airport body scanners cannot detect tumors or growths under the skin. However, they can detect metallic and non-metallic items on or below a person's clothing. For example, a person may be flagged for a pat-down if they have metallic fibers on their clothing or if they are carrying a packet of tissues. In these cases, a pat-down may be necessary to resolve any potential concerns raised by the body scan.
While airport body scanners are advanced, they can sometimes result in false positives or identify areas that require further inspection. A pat-down may be a necessary additional step to ensure the safety and security of all passengers. It is a routine procedure conducted by trained professionals to resolve any potential concerns raised by the body scan.
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Frequently asked questions
Airport scanners can detect a wide range of metallic and non-metallic items on or under clothing. If your chest glowed during a scan, it could be due to the clothing you were wearing, or you may have been flagged for a hidden explosive search, as large cysts or masses can appear as solid masses on scanners.
Radiation doses to passengers from airport security procedures are trivial. The major source of radiation exposure from air travel comes from the flight itself due to thinner air providing less protection from cosmic rays.
If you get flagged during an airport scan, you will likely be subjected to a pat-down search, which you can request to be done in a private room.
Airport scanners cannot detect tumors or any growths under the skin.
