Employing temporal self-similarity across the entire time domain in computed tomography reconstruction
File(s)
Published version
Author(s)
Type
Journal Article
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.
Date Issued
2015-05-04
Date Acceptance
2015-03-09
Citation
Philosophical Transactions of the Royal Society A: Mathematical, Physical & Engineering Sciences, 2015, 373 (2043)
ISSN
1364-503X
Publisher
The Royal Society
Journal / Book Title
Philosophical Transactions of the Royal Society A: Mathematical, Physical & Engineering Sciences
Volume
373
Issue
2043
Copyright Statement
© 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.
Creative Commons Attribution License http://creativecommons.org/licenses/
by/4.0/, which permits unrestricted use, provided the original author and
source are credited.
License URL
Sponsor
Engineering & Physical Science Research Council (E
Grant Number
EP/I021566/1
Subjects
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
iterative reconstruction
spatial-temporal regularization
time lapse tomography
non-local means
structural prior
NONLOCAL REGULARIZATION
ITERATIVE RECONSTRUCTION
INVERSE PROBLEMS
PROJECTION DATA
ALGORITHMS
NOISE
CT
spatial–temporal regularization
General Science & Technology
MD Multidisciplinary
Publication Status
Published
Article Number
20140389