Implementation of a beam hardening correction method for mono material parts using a linearization technique
Müller A, Butzhammer L, Hausotte T (2019)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2019
Publisher: Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V
City/Town: Berlin
Conference Proceedings Title: International Symposium on Digital Industrial Radiology and Computed Tomography
Event location: Fürth
ISBN: 978-3-947971-06-0
Open Access Link: https://www.dir2019.com/portals/dir2019/bb/We.3.A.2.pdf
Abstract
Common X-ray sources for industrial computed tomography (CT) exhibit a polychromatic spectrum. While the absorption of radiation by the measurement object is dependent on the X-ray energy, the commonly used reconstruction algorithms assume an absorption coefficient under monochromatic conditions. In the context of industrial CT, the material of a measurement object is oftentimes known, which makes the application of a linearizing beam hardening correction method possible for parts made out of a single material. In this work, we present an efficient setup and data processing pipeline to determine and manage experimental X-ray absorption models for mono material parts. This pipeline estimates the correlation between attenuation and penetration length using a cone shaped specimen and subsequently corrects the grey values of the projections of a measurement object of the same material as the specimen. In contrast to commonly used step wedges, the special specimen makes it possible to sample the absorption curve with a large number of grid points, while using a standard measurement operation mode for the CT system. The correction method makes it possible to measure the tooth flanks of a steel gear wheel, which could otherwise not be measured due to beam hardening artefacts.
Authors with CRIS profile
Andreas Müller
Lehrstuhl für Fertigungsmesstechnik
Lorenz Butzhammer
Lehrstuhl für Fertigungsmesstechnik
Tino Hausotte
Lehrstuhl für Fertigungsmesstechnik
Related research project(s)
How to cite
APA:
Müller, A., Butzhammer, L., & Hausotte, T. (2019). Implementation of a beam hardening correction method for mono material parts using a linearization technique. In International Symposium on Digital Industrial Radiology and Computed Tomography. Fürth, DE: Berlin: Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V.
MLA:
Müller, Andreas, Lorenz Butzhammer, and Tino Hausotte. "Implementation of a beam hardening correction method for mono material parts using a linearization technique." Proceedings of the International Symposium on Digital Industrial Radiology and Computed Tomography, Fürth Berlin: Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V, 2019.
BibTeX: Download