Characterization of a laboratory-based X-ray computed nanotomography system for propagation-based method of phase contrast imaging

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F20%3APU131883" target="_blank" >RIV/00216305:26620/20:PU131883 - isvavai.cz</a>
Result on the web
<a href="https://ieeexplore.ieee.org/document/8686191" target="_blank" >https://ieeexplore.ieee.org/document/8686191</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TIM.2019.2910338" target="_blank" >10.1109/TIM.2019.2910338</a>

Result language
angličtina
Original language name
Characterization of a laboratory-based X-ray computed nanotomography system for propagation-based method of phase contrast imaging
Original language description
Phase contrast imaging (PCI) is used to extend X-ray computed nanotomography (nCT) technique for analyzing samples with a low X-ray contrast, such as polymeric structures or soft tissues. Although this technique is used in many variations at synchrotrons, along with the development of X-ray tubes and X-ray detectors, a phase contrast imaging becomes available also for laboratory systems. This work is focused on determining the conditions for propagation-based PCI in laboratory nCT systems based on three criteria. It is mostly employed in near-field imaging regime, which is quantified via Fresnel number. X-rays must reach certain degree of coherence to form edge-enhancement. Finally, setup of every CT measurement has to avoid geometrical unsharpness due to the finite focal spot size. These conditions are evaluated and discussed in terms of different properties and settings of CT machine. Propagation-based PCI is tested on a sample of carbon fibres reinforced polyethylene and the implementation of Paganin phase retrieval algorithm on the CT data is shown.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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