Processing of projections containing phase contrast in
laboratory micro-computerized tomography imaging

J 2013

Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging

ZÁPRAŽNÝ, Z., D. KORYTÁR, Petr MIKULÍK and V. ÁČ

Basic information

Original name

Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging

Authors

ZÁPRAŽNÝ, Z. (703 Slovakia), D. KORYTÁR (703 Slovakia), Petr MIKULÍK (203 Czech Republic, guarantor, belonging to the institution) and V. ÁČ (703 Slovakia)

Edition

Journal of Applied Crystallography, Hoboken, WILEY-BLACKWELL, 2013, 0021-8898

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 3.950

RIV identification code

RIV/00216224:14740/13:00069093

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1107/S002188981300558X

UT WoS

000322032300017

Keywords in English

phase-contrast imaging; X-ray imaging; X-ray radiography; digital radiography; computerized tomography; computed radiography

Abstract

V originále

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. The possibilities of processing X-ray images of lightweight objects containing phase contrast using phase-retrieval methods in laboratory conditions are tested and the results obtained are presented. For this purpose, simulated and recorded X-ray projections taken from a laboratory imaging system with a microfocus X-ray source and a high-resolution CCD camera were processed and a qualitative comparison of results was made.

Links

ED1.1.00/02.0068, research and development project

Name: CEITEC - central european institute of technology

Citovat

ZÁPRAŽNÝ, Z., D. KORYTÁR, Petr MIKULÍK and V. ÁČ. Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging. Journal of Applied Crystallography. Hoboken: WILEY-BLACKWELL, 2013, vol. 46, Aug, p. 933-938. ISSN 0021-8898. Available from: https://dx.doi.org/10.1107/S002188981300558X.

@article{1120395,
   author = {Zápražný, Z. and Korytár, D. and Mikulík, Petr and Áč, V.},
   article_location = {Hoboken},
   article_number = {Aug},
   doi = {http://dx.doi.org/10.1107/S002188981300558X},
   keywords = {phase-contrast imaging; X-ray imaging; X-ray radiography; digital radiography; computerized tomography; computed radiography},
   language = {eng},
   issn = {0021-8898},
   journal = {Journal of Applied Crystallography},
   title = {Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging},
   url = {http://journals.iucr.org/j/issues/2013/04/00/xk5002/xk5002.pdf},
   volume = {46},
   year = {2013}
}

TY  - JOUR
ID  - 1120395
AU  - Zápražný, Z. - Korytár, D. - Mikulík, Petr - Áč, V.
PY  - 2013
TI  - Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging
JF  - Journal of Applied Crystallography
VL  - 46
IS  - Aug
SP  - 933-938
EP  - 933-938
PB  - WILEY-BLACKWELL
SN  - 00218898
KW  - phase-contrast imaging
KW  - X-ray imaging
KW  - X-ray radiography
KW  - digital radiography
KW  - computerized tomography
KW  - computed radiography
UR  - http://journals.iucr.org/j/issues/2013/04/00/xk5002/xk5002.pdf
L2  - http://journals.iucr.org/j/issues/2013/04/00/xk5002/xk5002.pdf
N2  - 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. The possibilities of processing X-ray images of lightweight objects containing phase contrast using phase-retrieval methods in laboratory conditions are tested and the results obtained are presented. For this purpose, simulated and recorded X-ray projections taken from a laboratory imaging system with a microfocus X-ray source and a high-resolution CCD camera were processed and a qualitative comparison of results was made.
ER  -

ZÁPRAŽNÝ, Z., D. KORYTÁR, Petr MIKULÍK and V. ÁČ. Processing of projections containing phase contrast in laboratory micro-computerized tomography imaging. \textit{Journal of Applied Crystallography}. Hoboken: WILEY-BLACKWELL, 2013, vol.~46, Aug, p.~933-938. ISSN~0021-8898. Available from: https://dx.doi.org/10.1107/S002188981300558X.

Detailed Information on Publication Record