A generalized quantitative interpretation of dark-field contrast for highly concentrated microsphere suspensions
Gkoumas, Spyridon ; Villanueva-Perez, Pablo LU
; Wang, Zhentian
; Romano, Lucia
; Abis, Matteo
and Stampanoni, Marco
(2016)
In Scientific Reports
6.
p.35259-35259
- Abstract
In X-ray grating interferometry, dark-field contrast arises due to partial extinction of the detected interference fringes. This is also called visibility reduction and is attributed to small-angle scattering from unresolved structures in the imaged object. In recent years, analytical quantitative frameworks of dark-field contrast have been developed for highly diluted monodisperse microsphere suspensions with maximum 6% volume fraction. These frameworks assume that scattering particles are separated by large enough distances, which make any interparticle scattering interference negligible. In this paper, we start from the small-angle scattering intensity equation and, by linking Fourier and real-space, we introduce the structure factor... (More)
In X-ray grating interferometry, dark-field contrast arises due to partial extinction of the detected interference fringes. This is also called visibility reduction and is attributed to small-angle scattering from unresolved structures in the imaged object. In recent years, analytical quantitative frameworks of dark-field contrast have been developed for highly diluted monodisperse microsphere suspensions with maximum 6% volume fraction. These frameworks assume that scattering particles are separated by large enough distances, which make any interparticle scattering interference negligible. In this paper, we start from the small-angle scattering intensity equation and, by linking Fourier and real-space, we introduce the structure factor and thus extend the analytical and experimental quantitative interpretation of dark-field contrast, for a range of suspensions with volume fractions reaching 40%. The structure factor accounts for interparticle scattering interference. Without introducing any additional fitting parameters, we successfully predict the experimental values measured at the TOMCAT beamline, Swiss Light Source. Finally, we apply this theoretical framework to an experiment probing a range of system correlation lengths by acquiring dark-field images at different energies. This proposed method has the potential to be applied in single-shot-mode using a polychromatic X-ray tube setup and a single-photon-counting energy-resolving detector.
(Less)
- author
- Gkoumas, Spyridon
; Villanueva-Perez, Pablo
LU
; Wang, Zhentian
; Romano, Lucia
; Abis, Matteo
and Stampanoni, Marco
- publishing date
- 2016-10-13
- type
- Contribution to journal
- publication status
- published
- in
- Scientific Reports
- volume
- 6
- pages
- 35259 - 35259
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:27734931
- scopus:84991435124
- ISSN
- 2045-2322
- DOI
- 10.1038/srep35259
- language
- English
- LU publication?
- no
- id
- 90699da1-ef44-42e2-9236-e71e7564146a
- date added to LUP
- 2019-03-29 16:56:41
- date last changed
- 2024-04-30 03:30:42
@article{90699da1-ef44-42e2-9236-e71e7564146a,
abstract = {{<p>In X-ray grating interferometry, dark-field contrast arises due to partial extinction of the detected interference fringes. This is also called visibility reduction and is attributed to small-angle scattering from unresolved structures in the imaged object. In recent years, analytical quantitative frameworks of dark-field contrast have been developed for highly diluted monodisperse microsphere suspensions with maximum 6% volume fraction. These frameworks assume that scattering particles are separated by large enough distances, which make any interparticle scattering interference negligible. In this paper, we start from the small-angle scattering intensity equation and, by linking Fourier and real-space, we introduce the structure factor and thus extend the analytical and experimental quantitative interpretation of dark-field contrast, for a range of suspensions with volume fractions reaching 40%. The structure factor accounts for interparticle scattering interference. Without introducing any additional fitting parameters, we successfully predict the experimental values measured at the TOMCAT beamline, Swiss Light Source. Finally, we apply this theoretical framework to an experiment probing a range of system correlation lengths by acquiring dark-field images at different energies. This proposed method has the potential to be applied in single-shot-mode using a polychromatic X-ray tube setup and a single-photon-counting energy-resolving detector.</p>}},
author = {{Gkoumas, Spyridon and Villanueva-Perez, Pablo and Wang, Zhentian and Romano, Lucia and Abis, Matteo and Stampanoni, Marco}},
issn = {{2045-2322}},
language = {{eng}},
month = {{10}},
pages = {{35259--35259}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{A generalized quantitative interpretation of dark-field contrast for highly concentrated microsphere suspensions}},
url = {{http://dx.doi.org/10.1038/srep35259}},
doi = {{10.1038/srep35259}},
volume = {{6}},
year = {{2016}},
}