Ignatyev, K;
Munro, PRT;
Speller, RD;
Olivo, A;
(2011)
Phase Contrast Imaging with Coded Apertures Using Laboratory-Based X-ray Sources.
In: McNulty, I and Eyberger, C and Lai, B, (eds.)
Proceedings of the 10th International Conference on X‐ray Microscopy.
(pp. pp. 254-257).
American Institute of Physics (AIP): Chicago, IL, USA.
Preview |
Text
Olivo_1.3625352.pdf - Published Version Download (408kB) | Preview |
Abstract
X‐ray phase contrast imaging is a powerful technique that allows detection of changes in the phase of x‐ray wavefronts as they pass through a sample. As a result, details not visible in conventional x‐ray absorption imaging can be detected. Until recently the majority of applications of phase contrast imaging were at synchrotron facilities due to the availability of their high flux and coherence; however, a number of techniques have appeared recently that allow phase contrast imaging to be performed using laboratory sources. Here we describe a phase contrast imaging technique, developed at University College London, that uses two coded apertures. The x‐ray beam is shaped by the pre‐sample aperture, and small deviations in the x‐ray propagation direction are detected with the help of the detector aperture. In contrast with other methods, it has a much more relaxed requirement for the source size (it works with source sizes up to 100 μm). A working prototype coded‐aperture system has been built. An x‐ray detector with directly deposited columnar CsI has been used to minimize signal spill‐over into neighboring pixels. Phase contrast images obtained with the system have demonstrated its effectiveness for imaging low‐absorption materials.
| Type: | Proceedings paper |
|---|---|
| Title: | Phase Contrast Imaging with Coded Apertures Using Laboratory-Based X-ray Sources |
| Event: | 10th International Conference on X‐ray Microscopy |
| Location: | Univ Chicago, Chicago, IL |
| Dates: | 15 August 2010 - 20 August 2010 |
| ISBN-13: | 9780735409255 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.3625352 |
| Publisher version: | http://dx.doi.org/10.1063/1.3625352 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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/1323175 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
