Endrizzi, M;
Astolfo, A;
Price, B;
Haig, I;
Olivo, A;
(2016)
Asymmetric masks for large field-of-view and high-energy X-ray phase contrast imaging.
In:
Institute of Physics
Preview |
Text
jinst-iworid16_ME_REV.pdf - Accepted Version Download (2MB) | Preview |
Abstract
We report on a large field of view, laboratory-based X-ray phase-contrast imaging setup. The method is based upon the asymmetric mask design that enables the retrieval of the absorption, refraction and scattering properties of the sample without the need to move any component of the imaging system. This can be thought of as a periodic repetition of a group of three (or more) apertures arranged in such a way that each laminar beam, defined by the apertures, produces a different illumination level when analysed with a standard periodic set of apertures. The sample is scanned through the imaging system, also removing possible aliasing problems that might arise from partial sample illumination when using the edge illumination technique. This approach preserves the incoherence and achromatic properties of edge illumination, removes the problems related to aliasing and it naturally adapts to those situations in clinical, industrial and security imaging where the image is acquired by scanning the sample relative to the imaging system. These concepts were implemented for a large field-of-view set of masks (20 cm × 1.5 cm and 15 cm × 1.2 cm), designed to work with a tungsten anode X-ray source operated up to 80–100 kVp, from which preliminary experimental results are presented.
| Type: | Proceedings paper |
|---|---|
| Title: | Asymmetric masks for large field-of-view and high-energy X-ray phase contrast imaging |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1748-0221/11/12/C12009 |
| Publisher version: | http://dx.doi.org/10.1088/1748-0221/11/12/C12009 |
| Language: | English |
| Additional information: | This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/1748-0221/11/12/C12009 |
| Keywords: | Inspection with x-rays; Multi-modality system |
| 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/1531031 |
Archive Staff Only
 |
View Item |
