UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Compact and cost effective lab-based edge-illumination X-ray phase contrast imaging with a structured focal spot

Basta, D; Endrizzi, M; Vittoria, FA; Astolfo, A; Olivo, A; (2016) Compact and cost effective lab-based edge-illumination X-ray phase contrast imaging with a structured focal spot. Applied Physics Letters , 108 (22) , Article 224102. 10.1063/1.4953459. Green open access

[thumbnail of 1.4953459.pdf]
Preview
Text
1.4953459.pdf

Download (1MB) | Preview

Abstract

We present a different implementation of the Edge Illumination (EI) X-ray Phase Contrast imaging method based on the use of multiple focal spots created through an additional x-ray mask. While this resembles directly inspired by the Talbot-Lau implementation of grating interferometry, the aim of the source mask and its effect on the acquired images are different. The individual “sourcelets” are much larger than in grating methods, and then still spatially incoherent; however their use allows a) exploiting cheap and large focal spot sources and b) reducing the source spot size from the usual 70-100 μm typically used in EI to few tens of μm, which enables the realisation of more compact setups. However, in EI, multiple sources create images shifted by one detector pixel with respect to the other, imposing the use of an image restoration algorithm. Here we show that the approach is feasible by deconvolving differential phase-contrast image profiles acquired with three separate sources, and comparing results with simulation predictions for equivalent profiles generated by a single source. We also show that this enables reducing the system length from the 2 m used so far to 1 m.

Type: Article
Title: Compact and cost effective lab-based edge-illumination X-ray phase contrast imaging with a structured focal spot
Location: USA
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.4953459
Publisher version: http://dx.doi.org/10.1063/1.4953459
Language: English
Additional information: © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Key Topics Diffraction gratings Illumination Image sensors X-ray imaging Interferometry
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/1493236
Downloads since deposit
114Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item