Hagen, CK;
Vittoria, FA;
Morgó, ORI;
Endrizzi, M;
Olivo, A;
(2020)
Cycloidal Computed Tomography.
Physical Review Applied
, 14
(1)
, Article 014069. 10.1103/physrevapplied.14.014069.
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Abstract
A general concept is presented for increasing the in-slice spatial resolution in computed tomography in a flexible manner and with relatively large source focal spots and detector pixels. The flexibility is a result of probing the sample with an array of thin beamlets shaped by a mask. Provided that the mask apertures are smaller than the combined blur of the x-ray source and detector and that no significant overlap between beamlets occurs, this introduces higher spatial frequencies into the image-formation process. The application of a cycloidal acquisition scheme, by which the sample is simultaneously rotated and translated, facilitates an efficient exploitation of these frequencies and their reconstruction into high-resolution tomographic images. Additionally, a preliminary study of the signal-to-noise ratio versus the delivered dose reveals significant dose-saving potential.
| Type: | Article |
|---|---|
| Title: | Cycloidal Computed Tomography |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevapplied.14.014069 |
| Publisher version: | https://doi.org/10.1103/physrevapplied.14.014069 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. https://creativecommons.org/licenses/by/4.0/ |
| 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/10106675 |
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