Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Pavlov, Konstantin M."'
Publikováno v:
Optica 11(8), 1182-1191 (2024)
Dark-field X-ray imaging is a novel modality which visualises scattering from unresolved microstructure. Most dark-field imaging techniques rely on crystals or structured illumination, but recent work has shown that dark-field effects are observable
Externí odkaz:
http://arxiv.org/abs/2309.15874
Publikováno v:
Scientific Reports 13, 5424 (2023)
Speckle-based phase-contrast X-ray imaging (SB-PCXI) can reconstruct high-resolution images of weakly-attenuating materials that would otherwise be indistinguishable in conventional attenuation-based imaging. The experimental setup of SB-PCXI require
Externí odkaz:
http://arxiv.org/abs/2302.01288
A new method is developed for three-dimensional (3D) reconstruction of multi-material objects using propagation-based X-ray phase-contrast tomography (PB-CT) with phase retrieval via the contrast transfer function (CTF) formalism. The approach differ
Externí odkaz:
http://arxiv.org/abs/2206.02688
Autor:
Alloo, Samantha J., Paganin, David M., Morgan, Kaye S., Gureyev, Timur E., Mayo, Sherry C., Mohammadi, Sara, Lockie, Darren, Menk, Ralf Hendrik, Arfelli, Fulvia, Zanconati, Fabrizio, Tromba, Giuliana, Pavlov, Konstantin M.
Publikováno v:
Optics Letters 47, 1945-1948 (2022)
Propagation-based phase-contrast X-ray imaging (PB-PCXI) generates image contrast by utilizing sample-imposed phase-shifts. This has proven useful when imaging weakly-attenuating samples, as conventional attenuation-based imaging does not always prov
Externí odkaz:
http://arxiv.org/abs/2110.06284
Autor:
Pavlov, Konstantin M., Paganin, David M., Morgan, Kaye S., Heyang, Li, Berujon, Sebastien, Quénot, Laurène, Brun, Emmanuel
Publikováno v:
Phys. Rev. A 104, 053505 (2021)
When a macroscopic-sized non-crystalline sample is illuminated using coherent x-ray radiation, a bifurcation of photon energy flow may occur. The coarse-grained complex refractive index of the sample may be considered to attenuate and refract the inc
Externí odkaz:
http://arxiv.org/abs/2105.10693
Autor:
Pavlov, Konstantin M., Paganin, David M., Li, Heyang, Berujon, Sebastien, Rougé-Labriet, Hélène, Brun, Emmanuel
Publikováno v:
Journal of Optics 22 125604 (2020)
We develop X-ray Multi-modal Intrinsic-Speckle-Tracking (MIST), a form of X-ray speckle-tracking that is able to recover both the position-dependent phase shift and the position-dependent small-angle X-ray scattering (SAXS) signal of a phase object.
Externí odkaz:
http://arxiv.org/abs/1911.06814
Akademický článek
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Autor:
Pavlov, Konstantin M., Heyang, Li, Paganin, David M., Berujon, Sebastien, Rougé-Labriet, Hélène, Brun, Emmanuel
Publikováno v:
Phys. Rev. Applied 13, 054023 (2020)
We develop a means for speckle-based phase imaging of the projected thickness of a single-material object, under the assumption of illumination by spatially random time-independent x-ray speckles. These speckles are generated by passing x rays throug
Externí odkaz:
http://arxiv.org/abs/1908.00411
Akademický článek
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Publikováno v:
J. Synchrotron Rad. (2019). 26, 825-838
The following paper describes a method for three-dimensional (3D) reconstruction of multi-material objects based on propagation-based X-ray phase-contrast tomography (PB-CT) with phase retrieval using the homogenous form of the Transport-of-Intensity
Externí odkaz:
http://arxiv.org/abs/1808.05368