Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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MREIT Conductivity Imaging of Pneumonic Canine Lungs: Preliminary Post-mortem Study

  • Kim, Hyung-Joong (Department of Biomedical Engineering, Kyung Hee University) ;
  • Kim, Young-Tae (Department of Biomedical Engineering, Kyung Hee University) ;
  • Jeong, Woo-Chul (Department of Biomedical Engineering, Kyung Hee University) ;
  • Minhas, Atul S. (Department of Biomedical Engineering, Kyung Hee University) ;
  • Lee, Tae-Hwi (Department of Biomedical Engineering, Kyung Hee University) ;
  • Lim, Chae-Young (BK21 Basic & Diagnostic Veterinary Specialist Program for Animal Diseases and Department of Veterinary Internal Medicine, Konkuk University) ;
  • Park, Hee-Myung (BK21 Basic & Diagnostic Veterinary Specialist Program for Animal Diseases and Department of Veterinary Internal Medicine, Konkuk University) ;
  • Kwon, O-Jung (Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Woo, Eung-Je (Department of Biomedical Engineering, Kyung Hee University)
  • Received : 2009.10.12
  • Accepted : 2010.03.17
  • Published : 2010.04.30
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Abstract

In magnetic resonance electrical impedance tomography (MREIT), a current-injection MR imaging method is adopted to produce a cross-sectional image of an electrical conductivity distribution in addition to MR images. The purpose of this study was to test the feasibility of MREIT for differentiating the canine lung parenchyma without and with pneumonia. Three normal healthy beagles and two mixed breed dogs with pneumonia were used. After attaching electrodes around the chest, we placed the dog inside our MR scanner. We injected as much as 30 mA current in a form of short pulses into the chest region. Reconstructed conductivity images of normal canine lungs exhibit a peculiar pattern of a relatively coarse salt and pepper noise. On the contrary, conductivity images of pneumonic canine lungs show significantly enhanced contrast of the lesions while the corresponding MR images show a little bit of contrast in the middle and caudal lung parenchyma due to the accumulation of pleural fluid. This preliminary study indicates that MREIT imaging of the chest may deliver unique new diagnostic information.

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References

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