Diemoz, PC;
Vittoria, FA;
Olivo, A;
(2016)
The concept of contrast transfer function for edge illumination X-ray phase-contrast imaging and its comparison with the free-space propagation technique.
Optics Express
, 24
(10)
pp. 11250-11265.
10.1364/OE.24.011250.
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Diemoz et al The concept of contrast transfer function for edge illumination X-ray phase-contrast imaging and its comparison with the free-space propagation technique VoR.pdf Download (1MB) | Preview |
Abstract
Previous studies on edge illumination (EI) X-ray phase-contrast imaging (XPCi) have investigated the nature and amplitude of the signal provided by this technique. However, the response of the imaging system to different object spatial frequencies was never explicitly considered and studied. This is required in order to predict the performance of a given EI setup for different classes of objects. To this scope, in the present work we derive analytical expressions for the contrast transfer function of an EI imaging system, using the approximation of near-field regime, and study its dependence upon the main experimental parameters. We then exploit these results to compare the frequency response of an EI system with respect of that of a free-space propagation XPCi one. The results achieved in this work can be useful for predicting the signals obtainable for different types of objects and also as a basis for new retrieval methods.
| Type: | Article |
|---|---|
| Title: | The concept of contrast transfer function for edge illumination X-ray phase-contrast imaging and its comparison with the free-space propagation technique |
| Location: | US |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/OE.24.011250 |
| Publisher version: | http://dx.doi.org/10.1364/OE.24.011250 |
| Language: | English |
| Additional information: | Copyright © 2016 OSA. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| Keywords: | X-ray imaging, Image formation theory, Image analysis |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1482219 |
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