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, Keun Seo Jin

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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
Pages (from-to)S279-S288
JournalPhysiological measurement
Volume26
Issue number2
DOIs
Publication statusPublished - 2005 Apr

All Science Journal Classification (ASJC) codes

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

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    Suk, H. O., Byung, I. L., Eung, J. W., Soo, Y. L., Kim, T. S., Kwon, O., & Jin, K. S. (2005). Electrical conductivity images of biological tissue phantoms in MREIT. Physiological measurement, 26(2), S279-S288. https://doi.org/10.1088/0967-3334/26/2/026