Millimeter wave scanners and backscatter scanners

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In summary, there are two types of full body scanners currently used in airports: millimeter wave scanners and backscatter scanners. Millimeter wave scanners use radio waves to reveal what is under clothing, while backscatter scanners use x-rays. However, backscatter scanners cannot penetrate the whole body like hospital x-ray machines and require higher doses of x-rays to reveal what is under the skin.
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CrimpJiggler
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Millimeter wave scanners and "backscatter" scanners

I was reading about these new full body scanners that they're implementing in airports these days. The two types of scanners in use today are millimeter wave scanners and backscatter scanners. From what I've gathered, millimeter wave scanners transmit radio waves which penetrate the clothes and reflect off the body, revealing what's under the clothes.

The backscatter devices on the other hand use x-rays. Can this backscatter technology penetrate the whole body, revealing the organs and what's inside the stomach etc, similar to what a hospital x-ray machine does? I read that to get more penetrating power, a higher dose of x-rays must be used, therefore lower doses of x-rays only reveal what's under the clothes, rather than inside the body, similar to what the millimeter wave scanners are capable of. Is that correct, are higher doses of x-rays required to reveal what's under the skin?
 
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CrimpJiggler said:
Is that correct, are higher doses of x-rays required to reveal what's under the skin?
No.

https://en.wikipedia.org/wiki/Backscatter_X-ray said:
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 reflectsfrom the target.
 

FAQ: Millimeter wave scanners and backscatter scanners

What are millimeter wave scanners and backscatter scanners?

Millimeter wave scanners and backscatter scanners are two types of advanced imaging technologies used in airport security to detect potential threats on passengers. They use different methods to create images of a person's body and reveal objects hidden under clothing.

How do millimeter wave scanners and backscatter scanners work?

Millimeter wave scanners use radio waves with frequencies between 30 and 300 gigahertz to create a 3D image of a person's body. These waves are harmless and are reflected off the body, revealing any objects that may be hidden. Backscatter scanners, on the other hand, use low-energy X-rays to produce a 2D image of a person's body. These X-rays are weaker than medical X-rays and are not harmful in small doses.

Are millimeter wave scanners and backscatter scanners safe?

Both types of scanners have been deemed safe by the U.S. Food and Drug Administration (FDA). Millimeter wave scanners use non-ionizing radiation and have no known health risks. Backscatter scanners use very low levels of ionizing radiation, which are well below the recommended safety limits set by the FDA.

Can millimeter wave scanners and backscatter scanners see through clothing?

Neither type of scanner can see through clothing. Millimeter wave scanners produce a blurred image that does not show anatomical details. Backscatter scanners create a generic outline of the body and any objects that may be hidden, but do not reveal specific body parts.

Are there any privacy concerns with millimeter wave scanners and backscatter scanners?

There have been concerns raised about the potential invasion of privacy with these scanners, as they do produce images of a person's body. However, measures have been put in place to protect privacy, such as having a separate room for viewing the images and having them displayed in a generic outline rather than a detailed image. Additionally, the images are not stored and are deleted immediately after they are viewed by security personnel.

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