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X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer

Endrizzi, M; Vittoria, FA; Rigon, L; Dreossi, D; Iacoviello, F; Shearing, PR; Olivo, A; (2017) X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer. Physical Review Letters , 118 (24) , Article 243902. 10.1103/PhysRevLett.118.243902. Green open access

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Abstract

We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities. The method is based on strongly structuring the x-ray beam with an amplitude modulator, before it reaches the sample, and on a multiaperture analyzing element before detection. A multislice representation of the sample is used to establish a quantitative relation between projection images and the corresponding three-dimensional distributions, leading to successful tomographic reconstruction. Sample absorption, phase, and scattering are retrieved from the measurement of five intensity projections. The method is tested on custom-built phantoms with synchrotron radiation: sample absorption and phase can be reliably retrieved also in combination with strong scatterers, simultaneously attaining high sensitivity and dynamic range.

Type: Article
Title: X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.118.243902
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.118.243902
Language: English
Additional information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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 Chemical Engineering
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/1555751
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