Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Conductivity Imaging of a Canine Head using a 3T MREIT System with a Carbon-Hydrogel Electrode: Postmortem Experiment

3T MREIT 시스템을 이용한 실험견 사체의 두부 도전율 영상

  • Jeong, Woo-Chul (College of Electronics and Information, Kyung Hee University) ;
  • Kim, Young-Tae (College of Electronics and Information, Kyung Hee University) ;
  • Minhas, Atul S. (College of Electronics and Information, Kyung Hee University) ;
  • Kim, Hyung-Joong (College of Electronics and Information, Kyung Hee University) ;
  • Lee, Tae-Hwi (College of Electronics and Information, Kyung Hee University) ;
  • Kang, Byeong-Teck (Department of Veterinary Internal Medicine, College of Veterinary Medicine, Konkuk University) ;
  • Park, Hee-Myung (Department of Veterinary Internal Medicine, College of Veterinary Medicine, Konkuk University) ;
  • Woo, Eung-Je (College of Electronics and Information, Kyung Hee University)
  • 정우철 (경희대학교 전자정보대학 동서의료공학과) ;
  • 김영태 (경희대학교 전자정보대학 동서의료공학과) ;
  • ;
  • 김형중 (경희대학교 전자정보대학 동서의료공학과) ;
  • 이태휘 (경희대학교 전자정보대학 동서의료공학과) ;
  • 강병택 (건국대학교 수의과대학 수의내과학교실) ;
  • 박희명 (건국대학교 수의과대학 수의내과학교실) ;
  • 우응제 (경희대학교 전자정보대학 동서의료공학과)
  • Published : 2009.04.30
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Abstract

Magnetic Resonance Electrical Impedance Tomography (MREIT) is a new bio-imaging modality providing cross-sectional conductivity images from measurements of internal magnetic flux densities produced by externally injected currents. Recent MREIT studies demonstrated successful conductivity image reconstructions of postmortem and in vivo canine brain. However, the whole head imaging was not achieved due to technical issues related with electrodes and noise in measured magnetic flux density data. In this study, we used a new carbon-hydrogel electrode with a large contact area and injected 30 mA imaging current through a canine head. Using a 3T MREIT system, we performed a postmortem canine experiment and produced high-resolution conductivity images of the entire canine head. Collecting magnetic flux density data inside the head subject to multiple injection currents, we reconstructed cross-sectional conductivity images using the harmonic $B_z$ algorithm. The conductivity images of the canine head show a good contrast not only inside the brain region including white and gray matter but also outside the brain region including the skull, temporalis muscle, mandible, lingualis proprius muscle, and masseter muscle.

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References

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