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KMID : 1137820090300020179
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의공학회지
2009 Volume.30 No. 2 p.179 ~ p.184
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Conductivity Imaging of a Canine Head using a 3T MREIT System with a Carbon-Hydrogel Electrode: Postmortem Experiment
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Jeong Woo-Chul
Kim Young-Tae
Atul S. Minhas
Kim Hyung-Joong
Lee Tae-Hwi
Kang Byeong-Teck
Park Hee-Myung
Woo Eung-Je
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Abstract
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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 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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KEYWORD
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MREIT, canine head, conductivity image, carbon-hydrogel electrode
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FullTexts / Linksout information
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