Multi-material linearization beam hardening correction for computed tomography
Multi-material linearization beam hardening correction for computed tomography
Beam hardening causes cupping and streaking artifacts in computed tomographic images, the presence of such artifacts can impair both qualitative and quantitative analysis of the reconstructed data. When the scanned object is composed of a single material, it is possible to correct beam hardening artifacts using the linearization method. However, for multi-material objects, an iterative segmentation-based correction algorithm is needed, which is not only computationally expensive, but may also fail if the initial segmentation result is poor. In this study, a new multi-material linearization beam hardening correction method was proposed and evaluated. The new method is fast and implemented in the same manner as a mono-material linearization. The correction takes approximately 0.02 seconds per projection. Although facing a potential disadvantage of requiring attenuation measurements of one of the object’s constituent materials, applying the new method has demonstrated its capability for a multi-material workpiece with substantial reduction in both cupping and streaking artifacts. For example, the study showed that the absolute cupping artefacts in steel, titanium and aluminum spheres were reduced from 22%, 20% and 20% to 5%, 1% and 0%, respectively.
beam hardening, computed tomography, multi-material, linearization, linearisation
629-640
Lifton, J.J.
9be501ec-2742-4ab6-8a5a-996c5b7c23ae
30 August 2017
Lifton, J.J.
9be501ec-2742-4ab6-8a5a-996c5b7c23ae
Lifton, J.J.
(2017)
Multi-material linearization beam hardening correction for computed tomography.
Journal of X-Ray Science and Technology, 25 (4), .
(doi:10.3233/XST-16197).
Abstract
Beam hardening causes cupping and streaking artifacts in computed tomographic images, the presence of such artifacts can impair both qualitative and quantitative analysis of the reconstructed data. When the scanned object is composed of a single material, it is possible to correct beam hardening artifacts using the linearization method. However, for multi-material objects, an iterative segmentation-based correction algorithm is needed, which is not only computationally expensive, but may also fail if the initial segmentation result is poor. In this study, a new multi-material linearization beam hardening correction method was proposed and evaluated. The new method is fast and implemented in the same manner as a mono-material linearization. The correction takes approximately 0.02 seconds per projection. Although facing a potential disadvantage of requiring attenuation measurements of one of the object’s constituent materials, applying the new method has demonstrated its capability for a multi-material workpiece with substantial reduction in both cupping and streaking artifacts. For example, the study showed that the absolute cupping artefacts in steel, titanium and aluminum spheres were reduced from 22%, 20% and 20% to 5%, 1% and 0%, respectively.
This record has no associated files available for download.
More information
Submitted date: 20 October 2016
Accepted/In Press date: 16 January 2017
e-pub ahead of print date: 3 March 2017
Published date: 30 August 2017
Keywords:
beam hardening, computed tomography, multi-material, linearization, linearisation
Identifiers
Local EPrints ID: 507725
URI: http://eprints.soton.ac.uk/id/eprint/507725
ISSN: 0895-3996
PURE UUID: 51a0dde9-0623-46f1-9b4d-7d1b8654095b
Catalogue record
Date deposited: 19 Dec 2025 18:14
Last modified: 20 Dec 2025 03:48
Export record
Altmetrics
Contributors
Author:
J.J. Lifton
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics