Sachin Walls
Many people wonder what airport body scanners can and cannot detect. The technology used by airport scanners has evolved over time, with older machines raising privacy concerns as they displayed naked images of passengers. Today's millimeter wave machines, however, do not show such explicit details and instead generate generic body outlines to protect passenger privacy. These scanners use Advanced Imaging Technology (AIT) to detect metallic and non-metallic threats, including weapons and prohibited items. While they do not see inside the body, there are conflicting reports about whether pads can be detected. Some sources claim that pads can trigger the scanner, especially if they contain metal or create extra material or bulk in the crotch area, while others suggest that pads are thin enough to go unnoticed.
| Characteristics | Values |
|---|---|
| Airport scanner type | Millimeter wave machines |
| What they detect | Metallic and non-metallic threats, mainly weapons |
| How they work | They use low-energy microwaves to measure the shape of surfaces |
| Privacy | They do not show a naked body on the screen. They generate generic images of a body. |
| Safety | They are safe and do not cause electromagnetic interference or device malfunction. |
| Can airport scanners see pads? | Yes, they can detect pads and thicker period underwear. |
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What You'll Learn
Airport scanners use radiofrequency waves, not X-rays
TSA body scanners can detect pads and thicker period underwear. However, not all pads will be detected. Pads with metal in them will be detected by metal detectors. Additionally, some standard security line scanners use microwaves to measure surface contours, which can be set off by extra material in an area, like a pad. Millimeter-wave scanners, on the other hand, use non-ionizing radiofrequency waves to detect threats. These machines bounce the waves off the body and back to the machine. If there are no weapons or other potential threats when someone is scanned, the screen turns green and shows an "OK". If an object is detected, it will appear on the screen along with a generic body outline to show the location. These scanners emit far less energy than a cell phone and are considered safe for those with pacemakers and defibrillators.
While X-ray machines are used to screen carry-on items and checked luggage, millimeter-wave scanners are used for full-body scanning. Backscatter X-ray machines send out low-energy X-rays that bounce off the skin of a person and the items under their clothing. These X-rays are then detected by the scanner and used to create an image. Millimeter-wave scanners, on the other hand, use radiofrequency waves instead of X-rays. These waves are non-ionizing and of low intensity, so they are considered safe and are not known to have any health risks associated with them.
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Scanners can detect metal and non-metal items
Scanners at airports are designed to detect metal and non-metal items. They are used to ensure the safety and security of air travel by identifying dangerous items such as weapons, chemicals, and liquids that are prohibited from being carried onto airplanes. These scanners use different technologies to detect items, including metal detectors, millimeter-wave machines, backscatter X-ray, and cabinet X-ray machines.
Metal detectors are commonly used at airports to identify metallic weapons, such as guns, knives, and other metal objects. They work by creating an electromagnetic field and detecting disruptions caused by conductive metallic objects. This includes various types of metals such as gold, titanium, and aluminum. Metal detectors can also detect non-metallic items that contain metal components, like electronics and tools.
Millimeter-wave scanners are another type of technology used for scanning passengers. These scanners use non-ionizing electromagnetic waves to create a 3D image of the body, penetrating clothing but reflecting off the skin and any concealed items, including metal. While these scanners cannot see through dense metal, they are effective at detecting metal objects, ensuring that prohibited items are not brought onboard.
Backscatter X-ray machines are used to detect threats such as weapons or explosives hidden under clothing. These machines use very low-energy X-rays that are reflected back to the machine, producing images that can identify dangerous items. Cabinet X-ray machines are also used to screen luggage and carry-on items, ensuring compliance with airline safety regulations.
While scanners are effective at detecting metal and non-metal items, they have limitations. For example, they may not detect drugs or other dangerous substances if they are physically inside a person's body cavity. Additionally, everyday items like belt buckles, jewelry, or coins can trigger alerts, leading to false positives during the screening process.
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Scanners can detect items inside clothing
Scanners at airports can detect items inside clothing. They use a technology called Advanced Imaging Technology (AIT) for full-body scans at airport checkpoints. They are millimetre-wave scanners that can detect a wide range of metallic and non-metallic objects in a matter of seconds. These scanners use radiofrequency waves to locate unknown objects on passengers. If the scanner detects something, it will indicate to agents where the object is located on the person's body.
While these scanners do not see inside the body, they can detect items inside clothing. For example, they can detect menstrual products such as pads, DivaCups, and thick period underwear. They can also detect other items inside clothing, such as a paper admission band around the wrist, a bra with a metal zipper, or scrunched-up socks. In some cases, loose-fitting clothing or extra material in the crotch area can also trigger the scanner.
The ability of scanners to detect items inside clothing depends on how they are calibrated. They use microwaves to measure the shape of surfaces, so they may flag dense items or extra material in certain areas. However, they do not see a proper image, only a rough outline, and they do not pick up size, weight, or height.
It is important to note that the primary purpose of these scanners is to detect potential threats, such as weapons or items that violate carry-on rules. They are not intended to invade privacy, and officers do not see the scanned image unless an alarm is triggered.
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Scanners are safe for those with pacemakers
Airport body scanners are safe for passengers with cardiac implantable electronic devices (CIEDs), such as pacemakers and defibrillators, according to research presented at Heart Rhythm 2019, the Heart Rhythm Society's 40th Annual Scientific Sessions. The results showed no negative interference after analyzing more than 1,000 scans. This is good news for the over 3 million people worldwide with pacemakers, a common CIED used to treat abnormal heart rhythms.
The study included 375 patients enrolled between May 2017 and October 2018, with devices such as implantable cardioverter defibrillators (ICD), conventional pacemakers, subcutaneous ICD, and leadless pacemakers. The sensitivity levels of the devices were not altered, and the findings showed no evidence of electromagnetic interference or device malfunction. This suggests that there is little need for specific protocols or restrictions on the use of body scans in people with pacemakers and other implantable devices.
In another study, Dr. Carsten Lennerz of the German Heart Centre Munich, Technical University of Munich, and German Centre for Cardiovascular Research determined that millimeter-wave scanners, which are commonly used in airports, should not cause interference with pacemakers and defibrillators. The scanners use low-energy microwaves to measure the shape of surfaces, and the scan time is very short, usually around 100 milliseconds. Cardiac devices may also filter out high-frequency signals such as millimeter waves, which barely penetrate the body.
While airport body scanners are generally safe for those with pacemakers, it is important to note that metal detectors, magnets, MRI scans, and other medical procedures can potentially interfere with the functionality of these devices. Patients with pacemakers should consult their healthcare providers for specific recommendations and precautions.
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Scanners do not show a person's naked body
While airport scanners can detect pads, they do not show a person's naked body. Early versions of the scanners did not have privacy protections, and officers located away from the checkpoint would view the images. However, these machines were removed from airports in 2013. Today, millimeter-wave machines do not show nipples or genitalia, and they do not pick up size, weight, or height. Instead, they generate generic images of a body with a box indicating the area where something was detected.
Millimeter-wave scanners use low-energy microwaves to measure the shape of surfaces. They are programmed to find things on a person, not inside a person. This means that drugs or other dangerous substances inside a body cavity can go undetected. The machines are considered safe, emitting 10,000 times less energy than a standard cellphone.
While pads can sometimes be detected by scanners, this is not always the case. Some travelers have reported that their tampons and pads did not set off the scanners, while others have been flagged for wearing thicker period underwear or a cup. It is important to note that airport scanners are primarily concerned with detecting weapons or items that violate carry-on rules.
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Frequently asked questions
Yes, airport scanners can detect pads, especially thicker ones. However, this does not always happen, and it depends on the type of scanner and how it is calibrated.
Airport scanners use Advanced Imaging Technology (AIT) to detect metallic and non-metallic threats. They send millimetre waves towards a passenger's body to measure the shape of surfaces and detect any oddities.
No, airport scanners cannot see inside the body. They are designed to detect items on a person, not inside them.
Airport scanners do not show a naked image of the body. They generate generic images, and if there is no issue detected, officers only see a screen reading "OK".
No, it is not necessary to remove your pad before going through an airport scanner. While pads may be detected in some cases, they are not prohibited items.
