Researchers from the University of Göttingen have developed a new approach to create color x-ray images. Previously, the only way to determine the chemical composition and position of components in a sample using X-ray fluorescence analysis was to focus the X-rays on the entire sample and scan it, which was time consuming and expensive. The new method makes it possible to view a large area in a single exposure, eliminating the need for focusing and scanning. The findings were published in a journal optical.

Unlike visible light, there are no lenses of comparable strength for “invisible” radiation such as X-rays, neutrons, or gamma rays. However, such radiations are important, for example, in nuclear medicine and radiology, as well as in industrial testing and materials analysis.

X-ray fluorescence applications include analysis of the chemical composition of paintings and cultural artifacts to determine authenticity, source or production technology, or analysis of soil or plant samples for environmental protection. The quality and purity of semiconductor components and computer chips can also be checked using X-ray fluorescence analysis.

For their new method, the scientists used a color X-ray camera developed by PNSensor in Munich and a new imaging system that essentially consists of a specially configured, gold-coated plate between the object and the detector; this means it casts a shadow for example. .

The intensity pattern measured in the detector provides information about the distribution of fluorescent atoms in the sample, which can then be resolved using a computer algorithm. This new approach means that unlike using an X-ray lens, the plate can be very close to the object or detector, making this method practical.

A PhD student at the university’s Institute for X-ray Physics, first author Dr. “We developed an algorithm that allows us to quickly and reliably generate a clear image for each color of X-ray radiation at the same time,” explains Jakob Soltau. Gottingen named after him.

Co-author Paul Mayer, a PhD student at the same institute, adds: “The optics are not comparable to conventional lenses; They were manufactured to our exact specifications by a new company in Switzerland.’

This new company, XRNanotech, specializes in nanostructures and Dr. It was founded by Florian Döring. at the University of Göttingen. Research group leader Professor Tim Salditt concludes: “Next, we want to extend this approach to 3D imaging of biological samples and also investigate imaging phenomena such as inelastic scattering of X-rays, neutrons or gamma radiation in nuclear medicine.”