Employing temporal self-similarity across the entire time domain in computed tomography reconstruction

Kazantsev, D.; Van Eyndhoven, G.; Lionheart, W.R.B.; Withers, P.J.; Dobson, K.J.; McDonald, S.A.; Atwood, R.; Lee, P.D.

doi:10.1098/rsta.2014.0389

Employing temporal self-similarity across the entire time domain in computed tomography reconstruction

Kazantsev, D.; Van Eyndhoven, G.; Lionheart, W.R.B.; Withers, P.J.; Dobson, K.J.; McDonald, S.A.; Atwood, R.; Lee, P.D.

Authors

D. Kazantsev

G. Van Eyndhoven

W.R.B. Lionheart

P.J. Withers

K.J. Dobson

S.A. McDonald

R. Atwood

P.D. Lee

Abstract

There are many cases where one needs to limit the X-ray dose, or the number of projections, or both, for high frame rate (fast) imaging. Normally, it improves temporal resolution but reduces the spatial resolution of the reconstructed data. Fortunately, the redundancy of information in the temporal domain can be employed to improve spatial resolution. In this paper, we propose a novel regularizer for iterative reconstruction of time-lapse computed tomography. The non-local penalty term is driven by the available prior information and employs all available temporal data to improve the spatial resolution of each individual time frame. A high-resolution prior image from the same or a different imaging modality is used to enhance edges which remain stationary throughout the acquisition time while dynamic features tend to be regularized spatially. Effective computational performance together with robust improvement in spatial and temporal resolution makes the proposed method a competitive tool to state-of-the-art techniques.

Citation

Kazantsev, D., Van Eyndhoven, G., Lionheart, W., Withers, P., Dobson, K., McDonald, S., …Lee, P. (2015). Employing temporal self-similarity across the entire time domain in computed tomography reconstruction. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 373(2043), Article 20140389. https://doi.org/10.1098/rsta.2014.0389

Journal Article Type	Article
Acceptance Date	Jun 1, 2015
Online Publication Date	May 4, 2015
Publication Date	Jun 13, 2015
Deposit Date	May 5, 2016
Publicly Available Date	May 9, 2016
Journal	Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences.
Print ISSN	1364-503X
Electronic ISSN	1471-2962
Publisher	The Royal Society
Peer Reviewed	Peer Reviewed
Volume	373
Issue	2043
Article Number	20140389
DOI	https://doi.org/10.1098/rsta.2014.0389

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© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.