Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes

S. H. Oh; B. I. Lee; E. J. Woo; S. Y. Lee; M. H. Cho; O. Kwon; J. K. Seo; W. S. Baek

Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes

S. H. Oh, B. I. Lee, E. J. Woo, S. Y. Lee, M. H. Cho, O. Kwon, J. K. Seo, W. S. Baek

Research output: Contribution to journal › Conference article › peer-review

Abstract

This paper presents cross-sectional conductivity and current density images of an inhomogeneous saline phantom. Using a 0.3 Tesla MRI scanner with its main magnetic field in the z-direction, we measured the z-component of the induced magnetic flux density B_z due to multiple injection currents. Four recessed electrodes are used to inject six different currents without producing artifacts near the boundary of the imaging subject. We used an image reconstruction algorithm called ∇²B^z algorithm to reconstruct images with a spatial resolution of 82×82 pixels (0.6×0.6 mm²/pixel). The accuracy of the reconstructed image was estimated as 13.8 to 21.5% in terms of the relative L²-error over all pixels.

Original language	English
Pages (from-to)	1023-1026
Number of pages	4
Journal	Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume	2
Publication status	Published - 2003
Event	A New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico Duration: 17 Sept 2003 → 21 Sept 2003

Keywords

Conductivity image
Current density image
Harmonic Bz algorithm
MREIT

Cite this

@article{2cdba938663747ff9dd53fcfba9569b8,

title = "Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes",

abstract = "This paper presents cross-sectional conductivity and current density images of an inhomogeneous saline phantom. Using a 0.3 Tesla MRI scanner with its main magnetic field in the z-direction, we measured the z-component of the induced magnetic flux density Bz due to multiple injection currents. Four recessed electrodes are used to inject six different currents without producing artifacts near the boundary of the imaging subject. We used an image reconstruction algorithm called ∇2Bz algorithm to reconstruct images with a spatial resolution of 82×82 pixels (0.6×0.6 mm2/pixel). The accuracy of the reconstructed image was estimated as 13.8 to 21.5% in terms of the relative L2-error over all pixels.",

keywords = "Conductivity image, Current density image, Harmonic Bz algorithm, MREIT",

author = "Oh, {S. H.} and Lee, {B. I.} and Woo, {E. J.} and Lee, {S. Y.} and Cho, {M. H.} and O. Kwon and Seo, {J. K.} and Baek, {W. S.}",

note = "Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; A New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society ; Conference date: 17-09-2003 Through 21-09-2003",

year = "2003",

language = "English",

volume = "2",

pages = "1023--1026",

journal = "Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings",

issn = "0589-1019",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - JOUR

T1 - Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes

AU - Oh, S. H.

AU - Lee, B. I.

AU - Woo, E. J.

AU - Lee, S. Y.

AU - Cho, M. H.

AU - Kwon, O.

AU - Seo, J. K.

AU - Baek, W. S.

PY - 2003

Y1 - 2003

N2 - This paper presents cross-sectional conductivity and current density images of an inhomogeneous saline phantom. Using a 0.3 Tesla MRI scanner with its main magnetic field in the z-direction, we measured the z-component of the induced magnetic flux density Bz due to multiple injection currents. Four recessed electrodes are used to inject six different currents without producing artifacts near the boundary of the imaging subject. We used an image reconstruction algorithm called ∇2Bz algorithm to reconstruct images with a spatial resolution of 82×82 pixels (0.6×0.6 mm2/pixel). The accuracy of the reconstructed image was estimated as 13.8 to 21.5% in terms of the relative L2-error over all pixels.

AB - This paper presents cross-sectional conductivity and current density images of an inhomogeneous saline phantom. Using a 0.3 Tesla MRI scanner with its main magnetic field in the z-direction, we measured the z-component of the induced magnetic flux density Bz due to multiple injection currents. Four recessed electrodes are used to inject six different currents without producing artifacts near the boundary of the imaging subject. We used an image reconstruction algorithm called ∇2Bz algorithm to reconstruct images with a spatial resolution of 82×82 pixels (0.6×0.6 mm2/pixel). The accuracy of the reconstructed image was estimated as 13.8 to 21.5% in terms of the relative L2-error over all pixels.

KW - Conductivity image

KW - Current density image

KW - Harmonic Bz algorithm

KW - MREIT

UR - http://www.scopus.com/inward/record.url?scp=1542302448&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:1542302448

SN - 0589-1019

VL - 2

SP - 1023

EP - 1026

JO - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings

JF - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings

T2 - A New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

Y2 - 17 September 2003 through 21 September 2003

ER -

Conductivity and Current Density Image Reconstruction in MREIT using Harmonic Bz Algorithm and Recessed Electrodes

Abstract

Keywords

Other files and links

Fingerprint

Cite this