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Statements

Subject Item
n2:RIV%2F00216224%3A14740%2F13%3A00069093%21RIV14-MSM-14740___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://journals.iucr.org/j/issues/2013/04/00/xk5002/xk5002.pdf
dcterms:description
Free-space-propagation-based imaging belongs to several techniques for achieving phase contrast in the hard X-ray range. The basic precondition is to use an X-ray beam with a high degree of coherence. Although the best sources of coherent X-rays are synchrotrons, spatially coherent X-rays emitted from a sufficiently small spot of laboratory microfocus or sub-microfocus sources allow the transfer of some of the modern imaging techniques from synchrotrons to laboratories. Spatially coherent X-rays traverse a sample leading to a phase shift. Beam deflection induced by the local change of refractive index may be expressed as a dark-bright contrast on the edges of the object in an X-ray projection. This phenomenon of edge enhancement leads to an increase in spatial resolution of X-ray projections but may also lead to unpleasant artefacts in computerized tomography unless phase and absorption contributions are separated. Free-space-propagation-based imaging belongs to several techniques for achieving phase contrast in the hard X-ray range. The basic precondition is to use an X-ray beam with a high degree of coherence. Although the best sources of coherent X-rays are synchrotrons, spatially coherent X-rays emitted from a sufficiently small spot of laboratory microfocus or sub-microfocus sources allow the transfer of some of the modern imaging techniques from synchrotrons to laboratories. Spatially coherent X-rays traverse a sample leading to a phase shift. Beam deflection induced by the local change of refractive index may be expressed as a dark-bright contrast on the edges of the object in an X-ray projection. This phenomenon of edge enhancement leads to an increase in spatial resolution of X-ray projections but may also lead to unpleasant artefacts in computerized tomography unless phase and absorption contributions are separated.
dcterms:title
Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging
skos:prefLabel
Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging
skos:notation
RIV/00216224:14740/13:00069093!RIV14-MSM-14740___
n16:predkladatel
n17:orjk%3A14740
n3:aktivita
n20:P
n3:aktivity
P(ED1.1.00/02.0068)
n3:cisloPeriodika
Aug
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n14:2966174
n3:druhVysledku
n21:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
99964
n3:idVysledku
RIV/00216224:14740/13:00069093
n3:jazykVysledku
n4:eng
n3:klicovaSlova
phase-contrast imaging; X-ray imaging; X-ray radiography; digital radiography; computerized tomography; computed radiography
n3:klicoveSlovo
n5:computerized%20tomography n5:computed%20radiography n5:X-ray%20imaging n5:X-ray%20radiography n5:phase-contrast%20imaging n5:digital%20radiography
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[EECEE7426F4D]
n3:nazevZdroje
Journal of Applied Crystallography
n3:obor
n7:BM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n11:ED1.1.00%2F02.0068
n3:rokUplatneniVysledku
n9:2013
n3:svazekPeriodika
46
n3:tvurceVysledku
Korytár, D. Áč, V. Mikulík, Petr Zápražný, Z.
n3:wos
000322032300017
s:issn
0021-8898
s:numberOfPages
6
n8:doi
10.1107/S002188981300558X
n15:organizacniJednotka
14740