Local harmonic Bz algorithm in MREIT

Sungwhan Kim; Jin Keun Seo; Sungwan Kim; Eung Je Woo; Kiwan Jun; Chang Ok Lee

doi:10.1007/978-3-540-73841-1_127

Local harmonic B_z algorithm in MREIT

Sungwhan Kim, Jin Keun Seo, Sungwan Kim, Eung Je Woo, Kiwan Jun, Chang Ok Lee

Department of Computational Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In magnetic resonance electrical impedance tomography (MREIT) where we try to reconstruct conductivity images with high spatial resolution, we should generate at least two non-parallel internal current density distributions by sequentially injecting multiple independent currents. However, when the object has a relatively very low conductivity region, the direction of current density due to any injection current becomes tangential to the boundary of the region. This kind of regions may include bones, lungs, and air-filled stomach. Hence, the previous MREIT reconstruction algorithms fail to provide accurate conductivity reconstruction near boundaries of insulating regions since this requirement is not satisfied. To deal with this difficulty, we propose local harmonic B_z-algorithm which find conductivity values in the separated problematic regions.

Original language	English
Title of host publication	13th International Conference on Electrical Bioimpedance and the 8th Conference on Electrical Impedance Tomography 2007, ICEBI 2007
Publisher	Springer Verlag
Pages	492-495
Number of pages	4
ISBN (Print)	9783540738404
DOIs	https://doi.org/10.1007/978-3-540-73841-1_127
Publication status	Published - 2007

Publication series

Name	IFMBE Proceedings
Volume	17 IFMBE
ISSN (Print)	1680-0737

All Science Journal Classification (ASJC) codes

Bioengineering
Biomedical Engineering

Access to Document

10.1007/978-3-540-73841-1_127

Cite this

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title = "Local harmonic Bz algorithm in MREIT",

abstract = "In magnetic resonance electrical impedance tomography (MREIT) where we try to reconstruct conductivity images with high spatial resolution, we should generate at least two non-parallel internal current density distributions by sequentially injecting multiple independent currents. However, when the object has a relatively very low conductivity region, the direction of current density due to any injection current becomes tangential to the boundary of the region. This kind of regions may include bones, lungs, and air-filled stomach. Hence, the previous MREIT reconstruction algorithms fail to provide accurate conductivity reconstruction near boundaries of insulating regions since this requirement is not satisfied. To deal with this difficulty, we propose local harmonic Bz-algorithm which find conductivity values in the separated problematic regions.",

author = "Sungwhan Kim and Seo, {Jin Keun} and Sungwan Kim and Woo, {Eung Je} and Kiwan Jun and Lee, {Chang Ok}",

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Local harmonic B_z algorithm in MREIT. / Kim, Sungwhan; Seo, Jin Keun; Kim, Sungwan et al.

13th International Conference on Electrical Bioimpedance and the 8th Conference on Electrical Impedance Tomography 2007, ICEBI 2007. Springer Verlag, 2007. p. 492-495 (IFMBE Proceedings; Vol. 17 IFMBE).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Local harmonic Bz algorithm in MREIT

AU - Kim, Sungwhan

AU - Seo, Jin Keun

AU - Kim, Sungwan

AU - Woo, Eung Je

AU - Jun, Kiwan

AU - Lee, Chang Ok

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AB - In magnetic resonance electrical impedance tomography (MREIT) where we try to reconstruct conductivity images with high spatial resolution, we should generate at least two non-parallel internal current density distributions by sequentially injecting multiple independent currents. However, when the object has a relatively very low conductivity region, the direction of current density due to any injection current becomes tangential to the boundary of the region. This kind of regions may include bones, lungs, and air-filled stomach. Hence, the previous MREIT reconstruction algorithms fail to provide accurate conductivity reconstruction near boundaries of insulating regions since this requirement is not satisfied. To deal with this difficulty, we propose local harmonic Bz-algorithm which find conductivity values in the separated problematic regions.

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