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Dual phase grating interferometer for tunable dark-field sensitivity

Kagias, Matias LU orcid ; Wang, Zhentian ; Jefimovs, Konstantins and Stampanoni, Marco (2017) In Applied Physics Letters 110(1).
Abstract

Hard X-ray dark-field and phase contrast imaging using grating interferometry have shown great potential for medical and industrial applications. However, the wide spread applicability of the method is challenged by a number of technical related issues such as relatively low dose and flux efficiency due to the absorption grating, fabrication of high quality absorption gratings, slow data acquisition protocol and high mechanical stability requirements. In this paper, the authors propose an interferometric method for dark-field and differential phase contrast imaging based on phase shifting elements only with the purpose to improve the dose and flux efficiency and simplify the setup. The proposed interferometer consists of two identical... (More)

Hard X-ray dark-field and phase contrast imaging using grating interferometry have shown great potential for medical and industrial applications. However, the wide spread applicability of the method is challenged by a number of technical related issues such as relatively low dose and flux efficiency due to the absorption grating, fabrication of high quality absorption gratings, slow data acquisition protocol and high mechanical stability requirements. In this paper, the authors propose an interferometric method for dark-field and differential phase contrast imaging based on phase shifting elements only with the purpose to improve the dose and flux efficiency and simplify the setup. The proposed interferometer consists of two identical phase gratings of small pitch (1.3 μm), which generate an interference fringe at the detector plane with a large enough pitch that can be resolved directly. In particular, the system exhibits flexible and tunable dark-field sensitivity which is advantageous to probe unresolvable micro-structure in the sample. Experiments on a micro focal tube validated the method and demonstrated the versatility and tunability of the system compared to conventional Talbot grating interferometer.

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author
; ; and
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
110
issue
1
article number
014105
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85008622399
ISSN
0003-6951
DOI
10.1063/1.4973520
language
English
LU publication?
no
additional info
Publisher Copyright: © 2017 Author(s).
id
ce168e6d-0ae7-42e1-8563-78b333087160
date added to LUP
2023-11-27 09:06:36
date last changed
2025-04-04 14:40:34
@article{ce168e6d-0ae7-42e1-8563-78b333087160,
  abstract     = {{<p>Hard X-ray dark-field and phase contrast imaging using grating interferometry have shown great potential for medical and industrial applications. However, the wide spread applicability of the method is challenged by a number of technical related issues such as relatively low dose and flux efficiency due to the absorption grating, fabrication of high quality absorption gratings, slow data acquisition protocol and high mechanical stability requirements. In this paper, the authors propose an interferometric method for dark-field and differential phase contrast imaging based on phase shifting elements only with the purpose to improve the dose and flux efficiency and simplify the setup. The proposed interferometer consists of two identical phase gratings of small pitch (1.3 μm), which generate an interference fringe at the detector plane with a large enough pitch that can be resolved directly. In particular, the system exhibits flexible and tunable dark-field sensitivity which is advantageous to probe unresolvable micro-structure in the sample. Experiments on a micro focal tube validated the method and demonstrated the versatility and tunability of the system compared to conventional Talbot grating interferometer.</p>}},
  author       = {{Kagias, Matias and Wang, Zhentian and Jefimovs, Konstantins and Stampanoni, Marco}},
  issn         = {{0003-6951}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Applied Physics Letters}},
  title        = {{Dual phase grating interferometer for tunable dark-field sensitivity}},
  url          = {{http://dx.doi.org/10.1063/1.4973520}},
  doi          = {{10.1063/1.4973520}},
  volume       = {{110}},
  year         = {{2017}},
}