Výsledky vyhledávání - "Venera Altapova"

Diagnostics of 3D Scaffolds by the Method of X-Ray Phase Contrast Visualization

Autor: Igor A. Khlusov, Tilo Baumbach, V. F. Pichugin, D. A. Karpov, Venera Altapova, F. Chen

Publikováno v: Russian Physics Journal. 56:1116-1123

Polymers are one of the most interesting classes of materials for bioengineering due to their high biocompatibility and the possibility of regulating their strength and degradation. In bioengineering, the design of a polymer scaffold determines the f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4cacdfc566c2856456d461621402cdfd
https://doi.org/10.1007/s11182-014-0150-9

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Imaging methods and their application at the ANKA synchrotron light source

Autor: Jürgen Mohr, G. T. Baumbach, E. Reznikova, Yu.L. Pivovarov, Venera Altapova, Alexey Ershov, Tomy dos Santos Rolo, Vladimir F. Pichugin

Publikováno v: Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques. 6:394-397

The imaging methods used at the ANKA Synchrotron Light Source (Institute for Synchrotron Radiation, Karlsruhe Institute of Technology) are briefly reviewed. Examples of recent applications of the phase-contrast imaging method using a grating interfer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1a61f4ba9ff574429445f6d97ceb2ef4
https://doi.org/10.1134/s1027451012050035

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X-ray phase-contrast radiography using a filtered white beam with a grating interferometer

Autor: Venera Altapova, Juergen Mohr, J.S. Butzer, Johannes Kenntner, Daniele Pelliccia, Tilo Baumbach, Tomy dos Santos Rolo, Angelica Cecilia, V. F. Pichugin, Julian Moosmann, Patrik Vagovic

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 648:S42-S45

One of the most promising methods of phase-contrast imaging is the Talbot grating interferometry. We report about the optimization of the method for fast imaging, requiring reduced exposure times by keeping sufficient imaging contrast. To do this a n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::64d1441d14865d95eaa0ece8c5fdf471
https://doi.org/10.1016/j.nima.2010.12.218

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Multi-contrast computed laminography at ANKA light source

Autor: Tilo Baumbach, Lukas Helfen, Yin Cheng, Michael Fiederle, Feng Xu, Venera Altapova, T. dos Santos Rolo, Patrik Vagovic

Publikováno v: Journal of physics / Conference Series, 463, 012038/1-5
11th International Conference on X-ray Microscopy (XRM)
11th International Conference on X-ray Microscopy (XRM), Aug 2012, Shanghai, China. 4 p., ⟨10.1088/1742-6596/463/1/012038⟩
'Journal of Physics : Conference Series ', vol: 463, pages: 012038-1-012038-4 (2013)

International audience; X-ray computed laminography has been developed as a non-destructive imaging technique for inspecting laterally extended objects. Benefiting from a parallel-beam geometry, high photon flux of synchrotron sources and modern high

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e392d1c4397b4762cff533b7558c16a9
https://publikationen.bibliothek.kit.edu/120099310

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X-ray phase-contrast in vivo microtomography probes new aspects of Xenopus gastrulation

Autor: Tilo Baumbach, Carole LaBonne, Julian Moosmann, Alexey Ershov, Xianghui Xiao, Venera Altapova, Ralf Hofmann, Maneeshi S. Prasad, Jubin Kashef

Publikováno v: Nature. 497(7449)

An ambitious goal in biology is to understand the behaviour of cells during development by imaging-in vivo and with subcellular resolution-changes of the embryonic structure. Important morphogenetic movements occur throughout embryogenesis, but in pa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecd1c91adb604af1eeff854c537656b0
https://pubmed.ncbi.nlm.nih.gov/23967481

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High-resolution X-ray phase-contrast tomography from single-distance radiographs applied to developmental stages of Xenopus laevis

Autor: Lukas Helfen, Tilo Baumbach, Venera Altapova, Julian Moosmann, Daniel Hänschke, Ralf Hofmann

Publikováno v: 11th International Conference on Synchrotron Radiation Instrumentation (SRI)
11th International Conference on Synchrotron Radiation Instrumentation (SRI), Jul 2012, Lyon, France. 5 p., ⟨10.1088/1742-6596/425/19/192003⟩
'Journal of Physics : Conference Series ', vol: 425, pages: 192003-1-1920033-5 (2013)

International audience; Considering a pure and not necessarily weak phase object, we review a noniterative and nonlinear single-distance phase-retrieval algorithm. The latter exploits the fact that a well-known linear contrast-transfer function, whic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00a6dc57b77d4b43236a31fe48c33c7b
https://hal.archives-ouvertes.fr/hal-01572950/document

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Phase contrast laminography based on Talbot interferometry

Autor: Venera, Altapova, Lukas, Helfen, Anton, Myagotin, Daniel, Hänschke, Julian, Moosmann, Jan, Gunneweg, Tilo, Baumbach

Publikováno v: Optics express. 20(6)

Synchrotron laminography is combined with Talbot grating interferometry to address weakly absorbing specimens. Integrating both methods into one set-up provides a powerful x-ray diagnostical technique for multiple contrast screening of macroscopicall

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::67352dac8f873f23b64026362296efb9
https://pubmed.ncbi.nlm.nih.gov/22418532

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Fabrication and characterization of analyzer gratings with high aspect ratios for phase contrast imaging using a Talbot interferometer

Autor: Tilo Baumbach, F. J. Pantenburg, Venera Altapova, Jan Meiser, Thomas Grund, Johannes Kenntner, Juergen Mohr

Publikováno v: AIP Conference Proceedings.

In recent years, X-ray imaging based on the differential phase contrast gained more and more attention to be used in X-ray imaging. Among other techniques like crystal-based diffraction and propagation methods, the grating based Talbot interferometry

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22326343803fa12ca23ded9b1d3a3508
https://doi.org/10.1063/1.3703349

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Three-dimensional imaging of dislocations by X-ray diffraction laminography

Autor: Tilo Baumbach, A. N. Danilewsky, Venera Altapova, Daniel Hänschke, Lukas Helfen

Publikováno v: Applied Physics Letters

Synchrotron radiation laminography with X-ray diffraction contrast enables three-dimensional imaging of dislocations in monocrystalline wafers. We outline the principle of the technique, the required experimental conditions, and the reconstruction pr

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Nonlinear, noniterative, single-distance phase retrieval and developmental biology

Autor: Tilo Baumbach, Ralf Hofmann, Daniel Hänschke, Venera Altapova, Julian Moosmann

Publikováno v: AIP Conference Proceedings.

For coherent X-ray imaging, based on phase contrast through free-space Fresnel propagation, we discuss two noniterative, nonlinear approaches to the phase-retrieval problem from a single-distance intensity map of a pure-phase object. On one hand, a p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9f6c3ed8e7bb759e619840ffca2655f8
https://doi.org/10.1063/1.3703343

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