How Does Airport x-ray scanners Work

Share on facebook
Share on google
Share on twitter
Share on linkedin

Have you ever wondered how the security screening system detects your luggage via the bag? We learned everything there is to know about airport x-ray scanners. During airport security checks, harmful commodities are prevented from entering planes and all flights arrive safely at their destinations. By coming to the gate area, all travelers have to pass through a metal scanner, and baggage’s are examined thoroughly with an X-ray scanner.


But what is the purpose of an X-ray scanner? An X-ray scanner resembles a boxy tunnel with a conveyor belt that transports baggage through the tunnel from the perspective of a traveler. The luggage is scanned with X-rays within the box; scanning is possible because X-rays penetrate different substances to varying degrees.


The machine creates x-rays. These are sent into the tunnel through a small opening in the lead lining. Each piece of baggage is carried through the X-ray beam by a conveyor belt, and a detector on the opposite side of the tunnel monitors the quantity of radiation that has entered the scanned item. Dense materials absorb the most radiation and prevent X-rays from traveling through them.



The Colors Of Different Materials


x-ray scanners pictures used to be black and white. In today’s world, different materials are represented in distinct colors in the image created by the scanner’s computer. Orange is the color of organic stuff such as wood, water, plastic, and textiles. Metals, for example, are inorganic and appear blue. It displays green on the screen if organic and inorganic compounds overlap in the scanned object.


Tennis balls in a metal tube, for example, seem green. Salt, glass, and bones are among the other green-colored things. The darker the object looks on the computer screen, the denser or thicker the material or layer of substance in the X-rays’ way. In order for the radiation to get through, substances that are too thick to pass through look dark.



Scanning With New Technology


The advancement of technology, according to Joni Pekkanen, has made images sharper and the scanning process smoother. He claims that images may be altered to provide a better perspective of the contents of the scanned luggage. They employed so-called dual view machines in an airport, which produce two distinct views of the same scanned object. In reality, this means that we rarely have to re-scan bags, which improves screening efficiency.


For the luggage processing center at Helsinki Airport, new scanners have been ordered. These scanners will automatically detect explosives using a combination of CT technology and X-rays, or computer tomography. The source of radiation revolves around the scanned item at a rapid speed in CT scanning, resulting in a three-dimensional picture. Up to 1,800 bags per hour may be scanned by one new scanner.


Security scanner radiation is not dangerous to humans or luggage. It is estimated that a scanned item receives a radiation dose of one microsievert, which is equivalent to the dose of cosmic background radiation received during an hour of flight at ten kilometers altitude. That’s 10 times less than a dental X-ray.