Sporadic absorption tomography using a conical shell X-ray beam

Elarnaut, F ORCID: https://orcid.org/0000-0003-0189-6665, Evans, JPO ORCID: https://orcid.org/0000-0001-9831-1461, Downes, D ORCID: https://orcid.org/0000-0002-4886-5260, Dicken, AJ, Godber, SX and Rogers, KD, 2017. Sporadic absorption tomography using a conical shell X-ray beam. Optics Express, 25 (26), pp. 33029-33042. ISSN 1094-4087

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Abstract

We demonstrate tomography by measuring a sporadic sequence of ring shaped projections collected during a translational scan. We show that projections using 10% sampling may be used to construct optical sections with peak signal-to-noise ratio (PSNR) and structural similarity index (SSIM) of the order of 40 dB and 0.9, respectively. This relatively small degradation in image fidelity was achieved for a 90% potential reduction in X-ray dose coupled with a reduction in scan time. Our approach is scalable in both X-ray energy and inspection volume. A driver for our method is to complement previously reported conical shell beam techniques concerning the measurement of diffracted flux for structural analysis. This work is of great relevance to time critical analytical scanning applications in security screening, process control and diagnostic imaging.

Item Type:	Journal article
Publication Title:	Optics Express
Creators:	Elarnaut, F., Evans, J.P.O., Downes, D., Dicken, A.J., Godber, S.X. and Rogers, K.D.
Publisher:	Optical Society of America
Date:	19 December 2017
Volume:	25
Number:	26
ISSN:	1094-4087
Identifiers:	Number Type 10.1364/OE.25.033029 DOI
Rights:	© 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	08 Feb 2018 14:11
Last Modified:	08 Feb 2018 14:11
URI:	https://irep.ntu.ac.uk/id/eprint/32647

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