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  • Spojení nejnovějších hybridních polovodičových pixelových detektorů s moderními mikro a nanofokusovými rentgenovými zdroji nabízí mnoho nových možností v radiačním zobrazování. Prostorové rozlišení je v radiografii zcela zásadním parametrem. Jeho zlepšování je stálou výzvou jak v oblasti experimentální, tak v oblasti zpracování dat. Z teoretického hlediska je zřejmé, že limitujícím faktorem pro prostorové rozlišení je konečná velikost zobrazovacího rentgenového zdroje (velikost kolimovaného svazku, velikost mikro nebo nanofokusu rentgenového zdroje, divergence synchrotronového záření, rentgenového laseru atd.). Hlavním cílem této práce je vývoj metod pro precizní měření intenzitní distribuce rentgenového zdroje s následným využitím dekonvoluce, která by měla vést k zlepšení prostorového rozlišení za teoretický limit daný konečnou velikostí zobrazovacího zdroje. (cs)
  • The spatial resolution of X-ray micro radiography is the crucial parameter. Its improvement remains a major experimental and data processing challenge. The lower limit of the spatial resolution of a radiographic method is given by the size of the point spread function (PSF). In the case of high geometrical magnification, the X-ray spot size becomes the most important factor for PSF determination. We have successfully measured in 2-D the X-ray spot shape and using deconvolution the spatial resolution has been improved up to three-fold. We have successfully illustrated the approach for real biological and material structure investigations. Another possibility for resolution enhancement is sub-pixel micro-shifting of the X-ray detector. Although this approach is quite common for optical imaging, it has not been fully investigated for X-ray imaging. In our measurements we have used sub-pixel micro-shifts of the Medipix2 detector. The method is successfully presented on real objects.
  • The spatial resolution of X-ray micro radiography is the crucial parameter. Its improvement remains a major experimental and data processing challenge. The lower limit of the spatial resolution of a radiographic method is given by the size of the point spread function (PSF). In the case of high geometrical magnification, the X-ray spot size becomes the most important factor for PSF determination. We have successfully measured in 2-D the X-ray spot shape and using deconvolution the spatial resolution has been improved up to three-fold. We have successfully illustrated the approach for real biological and material structure investigations. Another possibility for resolution enhancement is sub-pixel micro-shifting of the X-ray detector. Although this approach is quite common for optical imaging, it has not been fully investigated for X-ray imaging. In our measurements we have used sub-pixel micro-shifts of the Medipix2 detector. The method is successfully presented on real objects. (en)
Title
  • Enhancement of spatial resolution of roentgenographic methods
  • Zvyšování prostorového rozlišení rentgenografických metod (cs)
  • Enhancement of spatial resolution of roentgenographic methods (en)
skos:prefLabel
  • Enhancement of spatial resolution of roentgenographic methods
  • Zvyšování prostorového rozlišení rentgenografických metod (cs)
  • Enhancement of spatial resolution of roentgenographic methods (en)
skos:notation
  • RIV/68407700:21670/08:15152340!RIV09-MSM-21670___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(LC06041), Z(MSM6840770040)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 366262
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21670/08:15152340
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • deconvolution; spatial resolution; x-ray imaging (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [922A46AB0E62]
http://linked.open...v/mistoKonaniAkce
  • Praha
http://linked.open...i/riv/mistoVydani
  • Praha
http://linked.open...i/riv/nazevZdroje
  • Proceedings of Workshop 2008
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Jakůbek, Jan
  • Krejčí, František
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • České vysoké učení technické v Praze
https://schema.org/isbn
  • 978-80-01-04016-4
http://localhost/t...ganizacniJednotka
  • 21670
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