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Strategies for efficient and fast wave optics simulation of coded-aperture and other x-ray phase-contrast imaging methods

Vittoria, FA; Diemoz, PC; Endrizzi, M; Rigon, L; Lopez, FC; Dreossi, D; Munro, PRT; (2013) Strategies for efficient and fast wave optics simulation of coded-aperture and other x-ray phase-contrast imaging methods. Applied Optics , 52 (28) 6940 - 6947. 10.1364/AO.52.006940. Green open access

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Abstract

We derive a Fourier formulation of coded-aperture x-ray phase-contrast imaging, based on the wave theory of optics in the Fresnel approximation. We use this model to develop a flexible, efficient, and general simulation algorithm that can be easily adapted to other implementations of x-ray phase contrast imaging. Likewise, the algorithm enables a simple extension to 2D aperture designs, different acquisition schemes, etc. Problems related to numerical implementation of the algorithm are analyzed in detail, and simple rules are derived that enable us to avoid or at least mitigate them. Finally, comparisons with experimental data and data obtained with a different simulation algorithm are presented to validate the model and demonstrate its advantages in practical implementations. This also enabled us to demonstrate an increase in computational speed of more than one order of magnitude over a previous algorithm.

Type: Article
Title: Strategies for efficient and fast wave optics simulation of coded-aperture and other x-ray phase-contrast imaging methods
Location: US
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/AO.52.006940
Publisher version: http://www.opticsinfobase.org/ao/abstract.cfm?uri=...
Language: English
Additional information: © 2013 Optical Society of America
Keywords: diffraction theory, Fourier optics and signal processing, x-ray imaging, x-ray coded apertures
UCL classification: UCL > Provost and Vice Provost Offices
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/1407701
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