Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths

Rosalind Sadleir, Samuel Grant, Uk Zhang Sung, Il Lee Byung, Chan Pyo Hyun, Hoon Oh Suk, Chunjae Park, Je Woo Eung, Yeol Lee Soo, Ohin Kwon, Jin Keun Seo

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered from two MREIT systems, we found that a carefully designed MREIT study will be able to reduce noise levels below 0.25 and 0.05 nT at main magnetic field strengths of 3 and 11 T, respectively, at a voxel size of 3 x 3 x 3 mm3. Further noise level reductions can be achieved by optimizing MREIT pulse sequences and using signal averaging. We suggest two different methods to estimate magnetic flux noise levels, and the results are compared to validate the experimental setup of an MREIT system.

Original languageEnglish
Pages (from-to)875-884
Number of pages10
JournalPhysiological Measurement
Volume26
Issue number5
DOIs
Publication statusPublished - 2005 Oct 1

Fingerprint

Acoustic impedance
Magnetic resonance
Electric Impedance
Tomography
Noise
Magnetic Resonance Spectroscopy
Magnetic flux
Magnetic Fields
Protein Sorting Signals
Current density
Magnetic fields

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Physiology
  • Biomedical Engineering
  • Physiology (medical)

Cite this

Sadleir, Rosalind ; Grant, Samuel ; Sung, Uk Zhang ; Byung, Il Lee ; Hyun, Chan Pyo ; Suk, Hoon Oh ; Park, Chunjae ; Eung, Je Woo ; Soo, Yeol Lee ; Kwon, Ohin ; Seo, Jin Keun. / Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths. In: Physiological Measurement. 2005 ; Vol. 26, No. 5. pp. 875-884.
@article{f6210e2891ab43608ffcdcb3509614a2,
title = "Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths",
abstract = "In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered from two MREIT systems, we found that a carefully designed MREIT study will be able to reduce noise levels below 0.25 and 0.05 nT at main magnetic field strengths of 3 and 11 T, respectively, at a voxel size of 3 x 3 x 3 mm3. Further noise level reductions can be achieved by optimizing MREIT pulse sequences and using signal averaging. We suggest two different methods to estimate magnetic flux noise levels, and the results are compared to validate the experimental setup of an MREIT system.",
author = "Rosalind Sadleir and Samuel Grant and Sung, {Uk Zhang} and Byung, {Il Lee} and Hyun, {Chan Pyo} and Suk, {Hoon Oh} and Chunjae Park and Eung, {Je Woo} and Soo, {Yeol Lee} and Ohin Kwon and Seo, {Jin Keun}",
year = "2005",
month = "10",
day = "1",
doi = "10.1088/0967-3334/26/5/023",
language = "English",
volume = "26",
pages = "875--884",
journal = "Physiological Measurement",
issn = "0967-3334",
publisher = "IOP Publishing Ltd.",
number = "5",

}

Sadleir, R, Grant, S, Sung, UZ, Byung, IL, Hyun, CP, Suk, HO, Park, C, Eung, JW, Soo, YL, Kwon, O & Seo, JK 2005, 'Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths', Physiological Measurement, vol. 26, no. 5, pp. 875-884. https://doi.org/10.1088/0967-3334/26/5/023

Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths. / Sadleir, Rosalind; Grant, Samuel; Sung, Uk Zhang; Byung, Il Lee; Hyun, Chan Pyo; Suk, Hoon Oh; Park, Chunjae; Eung, Je Woo; Soo, Yeol Lee; Kwon, Ohin; Seo, Jin Keun.

In: Physiological Measurement, Vol. 26, No. 5, 01.10.2005, p. 875-884.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Noise analysis in magnetic resonance electrical impedance tomography at 3 and 11 T field strengths

AU - Sadleir, Rosalind

AU - Grant, Samuel

AU - Sung, Uk Zhang

AU - Byung, Il Lee

AU - Hyun, Chan Pyo

AU - Suk, Hoon Oh

AU - Park, Chunjae

AU - Eung, Je Woo

AU - Soo, Yeol Lee

AU - Kwon, Ohin

AU - Seo, Jin Keun

PY - 2005/10/1

Y1 - 2005/10/1

N2 - In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered from two MREIT systems, we found that a carefully designed MREIT study will be able to reduce noise levels below 0.25 and 0.05 nT at main magnetic field strengths of 3 and 11 T, respectively, at a voxel size of 3 x 3 x 3 mm3. Further noise level reductions can be achieved by optimizing MREIT pulse sequences and using signal averaging. We suggest two different methods to estimate magnetic flux noise levels, and the results are compared to validate the experimental setup of an MREIT system.

AB - In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered from two MREIT systems, we found that a carefully designed MREIT study will be able to reduce noise levels below 0.25 and 0.05 nT at main magnetic field strengths of 3 and 11 T, respectively, at a voxel size of 3 x 3 x 3 mm3. Further noise level reductions can be achieved by optimizing MREIT pulse sequences and using signal averaging. We suggest two different methods to estimate magnetic flux noise levels, and the results are compared to validate the experimental setup of an MREIT system.

UR - http://www.scopus.com/inward/record.url?scp=23744480289&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23744480289&partnerID=8YFLogxK

U2 - 10.1088/0967-3334/26/5/023

DO - 10.1088/0967-3334/26/5/023

M3 - Article

VL - 26

SP - 875

EP - 884

JO - Physiological Measurement

JF - Physiological Measurement

SN - 0967-3334

IS - 5

ER -