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Title: Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam

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.

Authors:
 [1];  [2];  [1];  [1]
  1. Lehrstuhl für Biomedizinische Physik, Physik-Department & Institut für Medizintechnik, Technische Universität München, 85748 Garching (Germany)
  2. Department of Physics & Astronomy, University College London, London WC1E 6BT (United Kingdom)
Publication Date:
OSTI Identifier:
22489487
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAMS; ENERGY SPECTRA; IMPLEMENTATION; PERFORMANCE; REFRACTION; SIGNALS; SIMULATION; TRANSMISSION; X RADIATION; X-RAY SOURCES; X-RAY SPECTRA

Citation Formats

Zdora, Marie-Christine, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, Department of Physics & Astronomy, University College London, London WC1E 6BT, Thibault, Pierre, Pfeiffer, Franz, Zanette, Irene, and Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE. Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam. United States: N. p., 2015. Web. doi:10.1063/1.4931145.
Zdora, Marie-Christine, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, Department of Physics & Astronomy, University College London, London WC1E 6BT, Thibault, Pierre, Pfeiffer, Franz, Zanette, Irene, & Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE. Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam. United States. https://doi.org/10.1063/1.4931145
Zdora, Marie-Christine, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, Department of Physics & Astronomy, University College London, London WC1E 6BT, Thibault, Pierre, Pfeiffer, Franz, Zanette, Irene, and Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE. Mon . "Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam". United States. https://doi.org/10.1063/1.4931145.
@article{osti_22489487,
title = {Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam},
author = {Zdora, Marie-Christine and Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE and Department of Physics & Astronomy, University College London, London WC1E 6BT and Thibault, Pierre and Pfeiffer, Franz and Zanette, Irene and Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE},
abstractNote = {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.},
doi = {10.1063/1.4931145},
url = {https://www.osti.gov/biblio/22489487}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 118,
place = {United States},
year = {2015},
month = {9}
}