Chen, Y;
Hagen, CK;
Olivo, A;
Anastasio, M;
(2020)
A partial-dithering strategy for edge-illumination X-ray phase-contrast tomography enabled by a joint reconstruction method.
Physics in Medicine and Biology
, 65
(10)
, Article 105007. 10.1088/1361-6560/ab66e2.
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Abstract
Edge-illumination X-ray phase-contrast tomography (EIXPCT) is a promising imaging technology where partially opaque masks are utilized with laboratory-based X-ray sources to estimate the distribution of the complex-valued refractive index. EIXPCT resolution is mainly determined by the period of a sample mask, but can be significantly improved by a dithering technique. Here, dithering means that multiple images per tomographic view angle are acquired as the object is moved over sub-pixel distances. Drawbacks of dithering include increased data-acquisition times and radiation doses. Motivated by the flexibility in data-acquisition designs enabled by a recently developed joint reconstruction (JR) method, a novel partial-dithering strategy for EIXPCT data-acquisition is proposed. In this strategy, dithering is implemented at only a subset of the tomographic view angles. The strategy can result in spatial resolution comparable to that of the conventional full-dithering strategy, where dithering is performed at every view angle, but the acquisition time is substantially decreased. Here, the effect of dithering parameters on image resolution are explored.
| Type: | Article |
|---|---|
| Title: | A partial-dithering strategy for edge-illumination X-ray phase-contrast tomography enabled by a joint reconstruction method |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6560/ab66e2 |
| Publisher version: | https://doi.org/10.1088/1361-6560/ab66e2 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. 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/10088504 |
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