Lioliou, Grammatiki;
Roche i Morgó, Oriol;
Astolfo, Alberto;
Zekavat, Amir Reza;
Endrizzi, Marco;
Bate, David;
Cipiccia, Silvia;
... Hagen, Charlotte; + view all
(2024)
Recent developments in fly scan methods for phase and multi-contrast x-ray micro-CT based on amplitude modulated beams.
Tomography of Materials and Structures
, 5
, Article 100034. 10.1016/j.tmater.2024.100034.
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Abstract
Beam tracking and edge illumination are phase contrast imaging techniques that rely on amplitude modulated x-ray beams to generate sensitivity to refraction and scattering. While each technique has its advantage (“single shot” three-contrast imaging in beam tracking; the ability to work with relatively large pixels in edge illumination), they also share a common drawback, namely that the modulator shields parts of the sample and, thus, prevents those areas from contributing to the image (under-sampling). Sample stepping, by which frames are acquired with the sample in a different position relative to the modulator (sometimes referred to as “dithering”) can produce well-sampled images. However, in computed tomography (CT), stepping must be performed at each rotation angle, enforcing step-and-shoot acquisitions and leading to long scan times. To enable faster acquisitions, fly scan compatible scanning schemes based on “roto-translating” the sample in the modulated x-ray beam were recently developed. This article reviews these schemes and provides practical guidance for their implementation.
| Type: | Article |
|---|---|
| Title: | Recent developments in fly scan methods for phase and multi-contrast x-ray micro-CT based on amplitude modulated beams |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.tmater.2024.100034 |
| Publisher version: | http://dx.doi.org/10.1016/j.tmater.2024.100034 |
| Language: | English |
| Additional information: | © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | X-ray micro-computed tomography, Phase contrast imaging, Fly scans, Rapid scanning, High-throughput scanning, Methods development |
| 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/10197178 |
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