Challenges for grating interferometer X-ray computed tomography for practical applications in industry

Speaker:
Kastner, Johann; University of Applied Sciences Upper Austria ; Austria

Authors:
Kastner, J.; University of Applied Sciences Upper Austria ; Austria
Gusenbauer, C.; University of Applied Sciences Upper Austria ; Austria
Plank, B.; University of Applied Sciences Upper Austria; Austria
Glinz, J.; University of Applied Sciences Upper Austria; Austria
Senck, S.; University of Applied Sciences Upper Austria; Austria

ID: ECNDT-0514-2018
Download: PDF
Session: CT-Applications 3
Room: G3
Date: 2018-06-13
Time: 14:30 - 14:50

X-ray imaging methods such as conventional X-ray computed tomography (XCT) based on absorption are essential techniques in various domains, e.g. medicine and materials science. In the last 15 years an important innovation in X-ray imaging technology has emerged through the introduction of Talbot-Lau grating interferometry (TLGI) [1-4]. Using this imaging technique with three different gratings the extraction of attenuation contrast (AC), differential phase contrast (DPC), dark-field contrast (DFC) information has become available in lab-based X-ray computed tomography systems. In this contribution, we demonstrate the usefulness of TLGI based XCT for different applications in industry and materials science. DPC has advantages for the discrimination of materials with similar X-ray attenuation like water and epoxy and is less probe to metal artefacts. In contrast, DFC is beneficial for the characterization of polymeric foams, for the detection of carbon yarn structures and for the detection of damage (cracks, micro-voids etc.) in different kinds of polymers. DFC´s anisotropy can be used to combine the results of two successive DFC measurements in 0 and 90 degrees allowing the visualization and quantification of the weaving pattern of a carbon fabric in 3D.