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Observations on the Performance of X-Ray Computed Tomography For Dimensional Metrology

Corcoran, HC; Brown, SB; Robson, S; Speller, RD; McCarthy, MB; (2016) Observations on the Performance of X-Ray Computed Tomography For Dimensional Metrology. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences , XLI-B5 pp. 25-31. 10.5194/isprs-archives-XLI-B5-25-2016. Green open access

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Abstract

X-ray computed tomography (XCT) is a rising technology within many industries and sectors with a demand for dimensional metrology, defect, void analysis and reverse engineering. There are many variables that can affect the dimensional metrology of objects imaged using XCT, this paper focusses on the effects of beam hardening due to the orientation of the workpiece, in this case a holeplate, and the volume of material the X-rays travel through. Measurements discussed include unidirectional and bidirectional dimensions, radii of cylinders, fit point deviations of the fitted shapes and cylindricity. Results indicate that accuracy and precision of these dimensional measurements are affected in varying amounts, both by the amount of material the X-rays have travelled through and the orientation of the object.

Type: Article
Title: Observations on the Performance of X-Ray Computed Tomography For Dimensional Metrology
Open access status: An open access version is available from UCL Discovery
DOI: 10.5194/isprs-archives-XLI-B5-25-2016
Publisher version: http://dx.doi.org/10.5194/isprs-archives-XLI-B5-25...
Language: English
Additional information: Copyright © The Author(s), 2016. All rights reserved. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS Archives) are open access publications, they are published under the Creative Common Attribution 3.0 License, see publications.copernicus.org/for_authors/license_and_copyright.html for details.
Keywords: X-ray computed tomography (XCT, dimensional metrology, holeplate, orientation, beam hardening
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1505768
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