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Prediction of beam hardening artefacts in computed tomography using Monte Carlo simulations

Thomsen, M.; Knudsen, E. B.; Willendrup, P. K.; Bech, Martin LU ; Willner, M.; Pfeiffer, F.; Poulsen, M.; Lefmann, K. and Feidenhans'l, R. (2015) In Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms 342. p.314-320
Abstract
We show how radiological images of both single and multi material samples can be simulated using the Monte Carlo simulation tool McXtrace and how these images can be used to make a three dimensional reconstruction. Good numerical agreement between the X-ray attenuation coefficient in experimental and simulated data can be obtained, which allows us to use simulated projections in the linearisation procedure for single material samples and in that way reduce beam hardening artefacts. The simulations can be used to predict beam hardening artefacts in multi material samples with complex geometry, illustrated with an example. Linearisation requires knowledge about the X-ray transmission at varying sample thickness, but in some cases homogeneous... (More)
We show how radiological images of both single and multi material samples can be simulated using the Monte Carlo simulation tool McXtrace and how these images can be used to make a three dimensional reconstruction. Good numerical agreement between the X-ray attenuation coefficient in experimental and simulated data can be obtained, which allows us to use simulated projections in the linearisation procedure for single material samples and in that way reduce beam hardening artefacts. The simulations can be used to predict beam hardening artefacts in multi material samples with complex geometry, illustrated with an example. Linearisation requires knowledge about the X-ray transmission at varying sample thickness, but in some cases homogeneous calibration phantoms are hard to manufacture, which affects the accuracy of the calibration. Using simulated data overcomes the manufacturing problems and in that way improves the calibration. (C) 2014 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Monte Carlo simulations, X-ray computed tomography, Beam hardening, artefacts
in
Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
volume
342
pages
314 - 320
publisher
Elsevier
external identifiers
  • wos:000347770500048
  • scopus:84914140003
ISSN
0168-583X
DOI
10.1016/j.nimb.2014.10.015
language
English
LU publication?
yes
id
e85a5afd-67fb-4a7c-8b17-9ac18a423966 (old id 5070054)
date added to LUP
2015-02-25 15:57:46
date last changed
2017-01-01 05:27:35
@article{e85a5afd-67fb-4a7c-8b17-9ac18a423966,
  abstract     = {We show how radiological images of both single and multi material samples can be simulated using the Monte Carlo simulation tool McXtrace and how these images can be used to make a three dimensional reconstruction. Good numerical agreement between the X-ray attenuation coefficient in experimental and simulated data can be obtained, which allows us to use simulated projections in the linearisation procedure for single material samples and in that way reduce beam hardening artefacts. The simulations can be used to predict beam hardening artefacts in multi material samples with complex geometry, illustrated with an example. Linearisation requires knowledge about the X-ray transmission at varying sample thickness, but in some cases homogeneous calibration phantoms are hard to manufacture, which affects the accuracy of the calibration. Using simulated data overcomes the manufacturing problems and in that way improves the calibration. (C) 2014 Elsevier B.V. All rights reserved.},
  author       = {Thomsen, M. and Knudsen, E. B. and Willendrup, P. K. and Bech, Martin and Willner, M. and Pfeiffer, F. and Poulsen, M. and Lefmann, K. and Feidenhans'l, R.},
  issn         = {0168-583X},
  keyword      = {Monte Carlo simulations,X-ray computed tomography,Beam hardening,artefacts},
  language     = {eng},
  pages        = {314--320},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms},
  title        = {Prediction of beam hardening artefacts in computed tomography using Monte Carlo simulations},
  url          = {http://dx.doi.org/10.1016/j.nimb.2014.10.015},
  volume       = {342},
  year         = {2015},
}