Model-based iterative reconstruction using higher-order regularization of dynamic synchrotron data
File(s)
Accepted version
Author(s)
Kazantsev, D
Guo, E
Phillion, AB
Withers, PJ
Lee, PD
Type
Journal Article
Abstract
We present a novel iterative reconstruction method applied to in situ x-ray synchrotron tomographic data of dendrite formation during the solidification of magnesium alloy. Frequently, fast dynamic imaging projection data are undersampled, noisy, of poor contrast and can contain various acquisition artifacts. Direct reconstruction methods are not suitable and iterative reconstruction techniques must be adapted to the existing data features. Normally, an accurate modelling of the objective function can guarantee a better reconstruction. In this work, we design a special cost function where the data fidelity term is based on the Group-Huber functional to minimize ring artifacts and the regularization term is a higher-order variational penalty. We show that the total variation penalty is unsuitable for some cases and higher-order regularization functionals can ensure a better fit to the expected properties of the data. Additionally, we highlight the importance of 3D regularization over 2D for the problematic data. The proposed method shows a promising performance dealing with angular undersampled noisy dynamic data with ring artifacts.
Date Issued
2017-08-21
Date Acceptance
2017-07-13
Citation
MEASUREMENT SCIENCE AND TECHNOLOGY, 2017, 28 (9)
ISSN
0957-0233
Publisher
IOP PUBLISHING LTD
Journal / Book Title
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume
28
Issue
9
Copyright Statement
© 2017 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Measurement Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://dx.doi.org/10.1088/1361-6501/aa7fa8
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000408155600002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Multidisciplinary
Instruments & Instrumentation
Engineering
model-based reconstruction
higher-order regularization
4D reconstruction
synchrotron x-ray microtomography
x-ray imaging
artifacts removal
TOMOGRAPHIC QUANTIFICATION
COMPUTED-TOMOGRAPHY
IMAGE-RESTORATION
LIGHT-SOURCE
ALLOYS
TIME
MICROTOMOGRAPHY
DENDRITES
EVOLUTION
STRATEGY
02 Physical Sciences
09 Engineering
Optics
Publication Status
Published
Article Number
ARTN 094004