Influence of detector misalignments on different geometrical and dimensional measurands using a dedicated test specimen

An important focus of research in Industrial X-ray Computed Tomography (CT) is to determine the task-specific measurement uncertainty of CT measurements numerically by using simulations. For this, all relevant influence factors need to be identified and quantified. It is known, for example, that geo...

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Bibliographic Details
Published in:E-journal of Nondestructive Testing 2022-03, Vol.27 (3)
Main Authors: Reuter, Tamara, Borges de Oliveira, Fabrício, Plotzki, David, Hausotte, Tino
Format: Article
Language:English
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Summary:An important focus of research in Industrial X-ray Computed Tomography (CT) is to determine the task-specific measurement uncertainty of CT measurements numerically by using simulations. For this, all relevant influence factors need to be identified and quantified. It is known, for example, that geometrical misalignments of the detector lead to measurement deviations if the reconstruction does not consider these misalignments. This contribution uses computer simulation of CT data to investigate the influence of geometrical misalignments of the detector on several measurands found in typical measurements tasks in the industry. A newly developed test specimen with a broad variety of features is used for this study. Angular and positional detector deviations are systematically introduced into the simulations and deliberately left uncompensated during the CT reconstruction. The resulting measurement deviations are shown and discussed.
ISSN:1435-4934
1435-4934
DOI:10.58286/26636