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

Zdora MC, Thibault P, Pfeiffer F, Zanette I (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Applied Physics AIP Publishing

Book Volume: 118

Article Number: 113105

Journal Issue: 11

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.

Involved external institutions

Technische Universität München (TUM) DE Germany (DE) University College London (UCL) GB United Kingdom (GB)

How to cite

APA:

Zdora, M.-C., Thibault, P., Pfeiffer, F., & Zanette, I. (2015). Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam. Journal of Applied Physics, 118(11). https://doi.org/10.1063/1.4931145

MLA:

Zdora, Marie-Christine, et al. "Simulations of x-ray speckle-based dark-field and phase-contrast imaging with a polychromatic beam." Journal of Applied Physics 118.11 (2015).

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