Effect of particle-size selectivity on quantitative X-ray dark-field computed tomography using a grating interferometer

According to the conclusion of Khelashvili et al. [Phys. Med. Biol. 51, 221 (2006)], the minus logarithm of the visibility ratio fulfills the line integral condition; consequently the scattering information can be reconstructed quantitatively by conventional computed tomography (CT) algorithms. Base...

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Bibliographic Details
Published in:Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2017-08, Vol.137, p.260-263
Main Authors: Bao, Yuan, Shao, Qigang, Hu, Renfang, Wang, Shengxiang, Gao, Kun, Wang, Yan, Tian, Yangchao, Zhu, Peiping
Format: Article
Language:English
Subjects:
Algorithms
Computation
Computed tomography
Dark-field
Diffraction
Diffraction theory
Fresnel diffraction
Grating interferometer
Particle size
Scattering
Selectivity
Signal to noise ratio
Tomography
Visibility
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Summary:According to the conclusion of Khelashvili et al. [Phys. Med. Biol. 51, 221 (2006)], the minus logarithm of the visibility ratio fulfills the line integral condition; consequently the scattering information can be reconstructed quantitatively by conventional computed tomography (CT) algorithms. Based on Fresnel diffraction theory, we analyzed the influence of particle-size selectivity on the performance of an X-ray grating interferometer (GI) applied for dark-field CT. The results state the signal-to-noise ratio (SNR) of dark-field imaging is sensitive to the particle size, which demonstrate that the X-ray dark-field CT using a GI can efficiently differentiate materials of identical X-ray absorption and help to choose optimal X-ray energy for known particle size, thus extending the application range of grating interferometer. •Propose a method to differentiate materials of identical X-ray absorption.•Quantitatively reconstruct the dark-field CT image with specific particle-size.•Extend the application range of grating interferometer.
ISSN:0969-806X
1879-0895
DOI:10.1016/j.radphyschem.2016.01.022