Electrical conductivity images of biological tissue phantoms in MREIT

Hoon Oh Suk, Il Lee Byung, Je Woo Eung, Yeol Lee Soo, Tae Seong Kim, Ohin Kwon, Jin Keun Seo

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

We present cross-sectional conductivity images of two biological tissue phantoms. Each of the cylindrical phantoms with both diameter and height of 140 mm contained chunks of biological tissues such as bovine tongue and liver, porcine muscle and chicken breast within a conductive agar gelatin as the background medium. We attached four recessed electrodes on the sides of the phantom with equal spacing among them. Injecting current pulses of 480 or 120 mA ms into the phantom along two different directions, we measured the z-component Bz of the induced magnetic flux density B = (Bx, B y, Bz) with a magnetic resonance electrical impedance tomography (MREIT) system based on a 3.0 T MRI scanner. Using the harmonic Bz algorithm, we reconstructed cross-sectional conductivity images from the measured Bz data. Reconstructed images clearly distinguish different tissues in terms of both their shapes and conductivity values. In this paper, we experimentally demonstrate the feasibility of the MREIT technique in producing conductivity images of different biological soft tissues with a high spatial resolution and accuracy when we use a sufficient amount of the injection current.

Original languageEnglish
JournalPhysiological Measurement
Volume26
Issue number2
DOIs
Publication statusPublished - 2005 Apr 1

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Electric Conductivity
Acoustic impedance
Magnetic resonance
Electric Impedance
Tomography
Magnetic Resonance Spectroscopy
Tissue
Magnetic flux
Gelatin
Tongue
Liver
Magnetic resonance imaging
Agar
Muscle
Chickens
Electrodes
Breast
Swine
Muscles
Injections

All Science Journal Classification (ASJC) codes

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

Cite this

Suk, Hoon Oh ; Byung, Il Lee ; Eung, Je Woo ; Soo, Yeol Lee ; Kim, Tae Seong ; Kwon, Ohin ; Seo, Jin Keun. / Electrical conductivity images of biological tissue phantoms in MREIT. In: Physiological Measurement. 2005 ; Vol. 26, No. 2.
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Electrical conductivity images of biological tissue phantoms in MREIT. / Suk, Hoon Oh; Byung, Il Lee; Eung, Je Woo; Soo, Yeol Lee; Kim, Tae Seong; Kwon, Ohin; Seo, Jin Keun.

In: Physiological Measurement, Vol. 26, No. 2, 01.04.2005.

Research output: Contribution to journalArticle

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AU - Kwon, Ohin

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