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Application of phase contrast tomography in laboratory-based X-ray micro-CT

Matthieu Boone (UGent) , Wouter Devulder (UGent) , Manuel Dierick (UGent) and Luc Van Hoorebeke (UGent)
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Abstract
Driven by the technical and computational evolution, X-ray micro-CT (µCT) has become a wide-spread tool in 3D imaging and analysis. In recent years, refraction of the X-rays has becomes visible due to the small focal spot size required for high resolution micro-CT systems. This effect can be beneficial for radiography, but can result in severe artifacts in tomographic reconstruction. This work presents two different methods in dealing with CT data in which both X-ray attenuation and X-ray refraction are visible. The “Modified Bronnikov Algorithm” is a phase retrieval method, which usus the phase information for reconstruction. Although it is based on stringent assumptions, it works well in practice for samples with low attenuation. For samples with higher attenuation, the “Bronnikov Aided Correction” decreases the contribution of the phase signal to allow a reconstruction with reduced artifacts. At the Centre for X-ray Tomography of the Ghent University, both methods are applied regularly for a wide range of applications. Since no hardware changes are necessary, these methods can also be used on projection data from any high-resolution CT setup.
Keywords
tomography, CT, phase contrast

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Chicago
Boone, Matthieu, Wouter Devulder, Manuel Dierick, and Luc Van Hoorebeke. 2011. “Application of Phase Contrast Tomography in Laboratory-based X-ray micro-CT.” In Digital Industrial Radiology and Computed Tomography, International Symposium, Abstracts.
APA
Boone, Matthieu, Devulder, W., Dierick, M., & Van Hoorebeke, L. (2011). Application of phase contrast tomography in laboratory-based X-ray micro-CT. Digital Industrial Radiology and Computed Tomography, International symposium, Abstracts. Presented at the International symposium on Digital Industrial Radiology and Computed Tomography.
Vancouver
1.
Boone M, Devulder W, Dierick M, Van Hoorebeke L. Application of phase contrast tomography in laboratory-based X-ray micro-CT. Digital Industrial Radiology and Computed Tomography, International symposium, Abstracts. 2011.
MLA
Boone, Matthieu, Wouter Devulder, Manuel Dierick, et al. “Application of Phase Contrast Tomography in Laboratory-based X-ray micro-CT.” Digital Industrial Radiology and Computed Tomography, International Symposium, Abstracts. 2011. Print.
@inproceedings{1904818,
  abstract     = {Driven by the technical and computational evolution, X-ray micro-CT ({\textmu}CT) has become a wide-spread tool in 3D imaging and analysis. In recent years, refraction of the X-rays has becomes visible due to the small focal spot size required for high resolution micro-CT systems. This effect can be beneficial for radiography, but can result in severe artifacts in tomographic reconstruction.
This work presents two different methods in dealing with CT data in which both X-ray attenuation and X-ray refraction are visible. The {\textquotedblleft}Modified Bronnikov Algorithm{\textquotedblright} is a phase retrieval method, which usus the phase information for reconstruction. Although it is based on stringent assumptions, it works well in practice for samples with low attenuation. For samples with higher attenuation, the {\textquotedblleft}Bronnikov Aided Correction{\textquotedblright} decreases the contribution of the phase signal to allow a reconstruction with reduced artifacts.
At the Centre for X-ray Tomography of the Ghent University, both methods are applied regularly for a wide range of applications. Since no hardware changes are necessary, these methods can also be used on projection data from any high-resolution CT setup.},
  author       = {Boone, Matthieu and Devulder, Wouter and Dierick, Manuel and Van Hoorebeke, Luc},
  booktitle    = {Digital Industrial Radiology and Computed Tomography, International symposium, Abstracts},
  keyword      = {tomography,CT,phase contrast},
  language     = {eng},
  location     = {Berlin, Germany},
  title        = {Application of phase contrast tomography in laboratory-based X-ray micro-CT},
  year         = {2011},
}