A harmonic -based conductivity reconstruction method in MREIT with influence of non-transversal current density

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Magnetic resonance electrical impedance tomography (MREIT) is a high-resolution conductivity imaging method utilizing measured magnetic flux density data induced by externally injected currents. Most MREIT image reconstruction methods including the harmonic Bz algorithm adopt iterative schemes to handle the non-linear relation between conductivity and magnetic flux density. Iterative methods, however, may not guarantee a reliable conductivity reconstruction when the measured magnetic flux density data are contaminated with a significant amount of noise. In this paper, we propose a new image reconstruction method which alleviates the technical difficulties of the iterative harmonic Bz algorithm. It effectively reduces the number of iterations by two at most. To improve the image quality, it incorporates the influence of non-transversal current densities. Providing theoretical observations and details of the proposed algorithm, we present results of numerical simulations and phantom experiments for its validation. © 2017 Informa UK Limited, trading as Taylor & Francis Group.
Publisher
TAYLOR & FRANCIS LTD
Issue Date
2018-06
Language
English
Article Type
Article
Citation

INVERSE PROBLEMS IN SCIENCE AND ENGINEERING, v.26, no.6, pp.811 - 833

ISSN
1741-5977
DOI
10.1080/17415977.2017.1352587
URI
http://hdl.handle.net/10203/248778
Appears in Collection
MA-Journal Papers(저널논문)
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