In most airports, people go through metal detectors, which use a low frequency electromagnetic field to search for weapons. Anything that generate or use electricity, such as power lines and household appliances, produce an electromagnetic field.
To low levels emitted by metal detectors, this exhibition can be considered safe for all, even for pregnant women. (The same goes for the manual artifacts that security personnel sometimes passes over some passengers individually).
Many people believe, mistakenly, that these metal detectors take x-rays, but it is not so. Without however the luggage x-ray machines, Yes. They emit the same kind of radiation that one x-ray dental and are used only in your suitcases and other inanimate objects that will be on the plane.
You should pass your hand through the curtain of a detector machine for baggage while the X-ray light was turned on to expose you to significant levels of radiation.
Currently, two different types of devices of security at airports in the United States are being implemented. There are a few body scanners that take an image of the surface of your body. These are designed to discover if people carry hidden some hazardous material under several layers of clothing.
One of these machines, called back scatter x-ray system, is considered somewhat controversial. Some people argue that this could affect the health of people who use it. The machine works as a very low x-ray tube power that scans the entire body at very fast speeds generating an image similar to a drawing with chalk.
The other device (which is called in English millimeter wave) is less controversial. It uses magnetic pulses that generate an image based on energy emitted from the body.
The safety management in transportation of United States (TSA), notes that possibilities of hazardous radiation exposure in the use of low back scatter x-ray system does not present a significant risk for pregnant women.
That agency also indicates that each detector test emits less than 1/1,000 of the radiation that is emitted in a routine chest x-ray, or the equivalent of two minutes of flying at high altitudes.
However, some medical experts question if enough tests and necessary studies of these artifacts, have been made before turning them on. Also worried what can happen when one of these machines do not work properly.
If you are worried about your child’s safety, or if do you these tests makes you feel uncomfortable, the TSA insists that you can ask that you physically recorded rather than pass through the detector.
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