Hagen, Charlotte K;
Lioliou, Grammatiki;
Roche i Morgo, Oriol;
Shah, Khushal;
Zekavat, Amir;
Astolfo, Alberto;
Munro, Peter;
... Olivo, Alessandro; + view all
(2024)
X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook.
In: Müller, Bert and Wang, Ge, (eds.)
Proceedings of the Developments in X-Ray Tomography XV.
(pp. pp. 1-6).
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Abstract
In recent years, x-ray micro-computed tomography (micro-CT) systems with amplitude modulated beams have gained global interest. These systems feature a modulator, that is, an x-ray opaque mask with periodically spaced apertures, in front of the sample, creating an array of spatially separated beamlets. The approach offers x-ray phase contrast imaging (XPCI), which improves the contrast-to-noise ratio and reveals the presence of sub-resolution inhomogeneities by capturing, respectively, refraction and ultra-small angle scattering (dark field signal) alongside x-ray attenuation. Additionally, the modulator can increase spatial resolution, as the narrow beamlets can transfer higher spatial frequencies without requiring geometric magnification. This brief communication reviews the working principle of the approach and comments on a remaining challenge (relatively long scan times).
| Type: | Proceedings paper |
|---|---|
| Title: | X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook |
| Event: | Developments in X-Ray Tomography XV |
| Location: | San Diego, California, United States |
| Dates: | 18th-23rd August 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3029040 |
| Publisher version: | http://dx.doi.org/10.1117/12.3029040 |
| 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 > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10199367 |
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