Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam
Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam
Following the first experimental demonstration of x-ray speckle-based multimodal imaging using a polychromatic beam [I. Zanette et al ., Phys. Rev. Lett. 112(25), 253903 (2014)], we present a simulation study on the effects of a polychromatic x-ray spectrum on the performance of this technique. We observe that the contrast of the near-field speckles is only mildly influenced by the bandwidth of the energy spectrum. Moreover, using a homogeneous object with simple geometry, we characterize the beam hardening artifacts in the reconstructed transmission and refraction angle images, and we describe how the beam hardening also affects the dark-field signal provided by speckle tracking. This study is particularly important for further implementations and developments of coherent speckle-based techniques at laboratory x-ray sources.
Zdora, Marie Christine
cea26261-9f86-4fa1-9122-2371a3818563
Thibault, Pierre
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Pfeiffer, Franz
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Zanette, Irene
39ee899c-0aae-4fac-aec6-826f848a8022
21 September 2015
Zdora, Marie Christine
cea26261-9f86-4fa1-9122-2371a3818563
Thibault, Pierre
975a4c7b-6ca9-4958-b362-9eba10ab926b
Pfeiffer, Franz
90bfb684-c442-458c-8f10-64d0e89cbef1
Zanette, Irene
39ee899c-0aae-4fac-aec6-826f848a8022
Zdora, Marie Christine, Thibault, Pierre, Pfeiffer, Franz and Zanette, Irene
(2015)
Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam.
Journal of Applied Physics, 118 (11), [113105].
(doi:10.1063/1.4931145).
Abstract
Following the first experimental demonstration of x-ray speckle-based multimodal imaging using a polychromatic beam [I. Zanette et al ., Phys. Rev. Lett. 112(25), 253903 (2014)], we present a simulation study on the effects of a polychromatic x-ray spectrum on the performance of this technique. We observe that the contrast of the near-field speckles is only mildly influenced by the bandwidth of the energy spectrum. Moreover, using a homogeneous object with simple geometry, we characterize the beam hardening artifacts in the reconstructed transmission and refraction angle images, and we describe how the beam hardening also affects the dark-field signal provided by speckle tracking. This study is particularly important for further implementations and developments of coherent speckle-based techniques at laboratory x-ray sources.
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1.4931145
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Accepted/In Press date: 5 September 2015
Published date: 21 September 2015
Identifiers
Local EPrints ID: 431002
URI: http://eprints.soton.ac.uk/id/eprint/431002
ISSN: 0021-8979
PURE UUID: be93de62-0632-43e2-990a-8271e5c3f5b3
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Date deposited: 21 May 2019 16:30
Last modified: 16 Mar 2024 01:51
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Author:
Marie Christine Zdora
Author:
Pierre Thibault
Author:
Franz Pfeiffer
Author:
Irene Zanette
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