Z Backscatter technology was pioneered by AS&E.
It is the proven approach for the discrimination of organic materials such as explosives, drugs, cigarettes, and people, especially when hidden within a complex environment.
- The photo-like images are easy-to-interpret, revealing both the presence and exact position of organic components of the scanned object.
- It is the most effective X-ray technology for the detection of organic materials.
How Do X-rays work?
When X-rays interact with matter, they do one of three things:
- Pass through the object
- Get absorbed by the object
- Scatter from the object
Objects with higher density absorb more X-rays than objects with lesser density. Much organic material is low-density and X-rays scatter when they interact with organic objects.
Traditional transmission X-ray images like medical X-rays result when X-rays pass through an object to a detector located on the far side of the object. The resulting image is bright where most of the X-rays pass through the object and dark where most X-rays are absorbed.
Z Backscatter technology captures the data from the X-rays that are scattered away from the object, back towards a near-sided detector. This primary scattering effect is known as “Compton Scattering.” The Z Backscatter image is bright white where X-rays scatter the strongest, indicating organic matter, such as explosive material and drugs. Even inorganic objects, such as metals, are given shape and form in Z Backscatter images.
The difference with Z Backscatter
We create photo-like Z Backscatter images showing organic materials by directing a sweeping beam of X-rays at the object under examination, and then measuring and plotting the intensity of scattered X-rays as a function of the beam position. This is made possible by patented “Flying Spot” technology. Flying Spot technology allows the position of the X-ray beam to be defined at every instant. So any Z Backscatter signal received is easily correlated with the precise region of the object undergoing inspection.
Z Backscatter's photo-like images are easy-to-interpret, revealing both the presence and exact position of organic components of the inspected object. This significantly enhances the ability of operators to quickly understand and interpret scan results.