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

Thomsen M, Knudsen EB, Willendrup PK, Bech M, Willner M, Pfeiffer F, Poulsen M, Lefmann K, Feidenhans'L R (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Elsevier

Book Volume: 342

Pages Range: 314-320

DOI: 10.1016/j.nimb.2014.10.015

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.

Involved external institutions

Technical University of Denmark / Danmarks Tekniske Universitet (DTU) DK Denmark (DK) Technische Universität München (TUM) DE Germany (DE) University of Copenhagen DK Denmark (DK) Novo Nordisk A/S DK Denmark (DK)

How to cite

APA:

Thomsen, M., Knudsen, E.B., Willendrup, P.K., Bech, M., Willner, M., Pfeiffer, F.,... Feidenhans'L, R. (2015). Prediction of beam hardening artefacts in computed tomography using Monte Carlo simulations. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 342, 314-320. https://doi.org/10.1016/j.nimb.2014.10.015

MLA:

Thomsen, M., et al. "Prediction of beam hardening artefacts in computed tomography using Monte Carlo simulations." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 342 (2015): 314-320.

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