Navarrete-León, C;
Doherty, A;
Astolfo, A;
Hagen, CK;
Munro, P;
Olivo, A;
Endrizzi, M;
(2023)
Two-directional beam-tracking for phase-sensitive x-ray tomography with laboratory sources.
In:
Proceedings of the 15th International Conference on X-ray Microscopy – XRM2022.
AIP Publishing
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Abstract
X-ray phase-contrast imaging is a powerful imaging modality for non-destructive visualisation of weakly-absorbing materials inside an object. We present here a two-directional beam-tracking approach for phase-contrast imaging in a laboratory setup. A single absorption mask is used to modulate the polychromatic x-ray beam, and the divergence of the beam is exploited to analyse the beamlets with detector pixels comparable in size to the mask pitch. The method gives access to two orthogonal phase gradients, which allows for robust phase integration. Two implementations are demonstrated: one with a low-noise photon-counting device for radiography, and the other with an indirect conversion flat-panel detector for phase-contrast tomography. Finally, images of biological specimens are presented to show the potential of the approach for biomedical applications.
| Type: | Proceedings paper |
|---|---|
| Title: | Two-directional beam-tracking for phase-sensitive x-ray tomography with laboratory sources |
| Event: | 15th International Conference on X-ray Microscopy – XRM2022 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0168510 |
| Publisher version: | https://doi.org/10.1063/5.0168510 |
| Language: | English |
| Additional information: | © 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Optical metrology, X-ray phase contrast imaging, Phase contrast microscopy, Radiography, Tomography |
| 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-pp.ucl.ac.uk/id/eprint/10182504 |
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