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Enabling three-dimensional densitometric measurements using laboratory source X-ray micro-computed tomography

Pankhurst, MJ; Fowler, R; Courtois, L; Nonni, S; Zuddas, F; Atwood, RC; Davis, GR; (2018) Enabling three-dimensional densitometric measurements using laboratory source X-ray micro-computed tomography. SoftwareX , 7 pp. 115-121. 10.1016/j.softx.2018.03.004. Green open access

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Abstract

We present new software allowing significantly improved quantitative mapping of the three-dimensional density distribution of objects using laboratory source polychromatic X-rays via a beam characterisation approach (c.f. filtering or comparison to phantoms). One key advantage is that a precise representation of the specimen material is not required. The method exploits well-established, widely available, non-destructive and increasingly accessible laboratory-source X-ray tomography. Beam characterisation is performed in two stages: (1) projection data are collected through a range of known materials utilising a novel hardware design integrated into the rotation stage; and (2) a Python code optimises a spectral response model of the system. We provide hardware designs for use with a rotation stage able to be tilted, yet the concept is easily adaptable to virtually any laboratory system and sample, and implicitly corrects the image artefact known as beam hardening.

Type: Article
Title: Enabling three-dimensional densitometric measurements using laboratory source X-ray micro-computed tomography
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.softx.2018.03.004
Publisher version: http://dx.doi.org/10.1016/j.softx.2018.03.004
Language: English
Additional information: Copyright © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Laboratory X-ray micro-computed tomography, Beam characterisation, PythonBeam hardening, Three-dimensional densitometry
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 Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10049111
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