지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
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 Bz 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.
목차
등록된 정보가 없습니다.
참고문헌 (17)
참고문헌 신청
Atul S. Minhas / 2008 / MREIT of Postmortem Swine Legs using Carbon-hydrogel Electrodes / 의공학회지 29 (6) : 436 ~ 442
C. Gabriel / 1996 / The dielectric properties of biological tissues: I. Literature survey / Phys. Med. Biol 41 : 2231 ~ 2249
C. Park / 2006 / Measurement of induced magnetic flux density using injection current nonlinear encoding (ICNE) in MREIT / Physiol. Meas 28 : 117 ~ 127
E.J. Woo / 1994 / Impedance tomography using internal current density distribution measured by nuclear magnetic resonance / SPIE 2299 : 377 ~ 385
H.J. Kim / 2007 / Conductivity imaging of canine brain using a 3 T MREIT system: postmortem experiments / Physiol. Meas 28 : 1341 ~ 1353
C. Gabriel / 1996 / The dielectric properties of biological tissues: I. Literature survey / Phys. Med. Biol 41 : 2231 ~ 2249
C. Park / 2006 / Measurement of induced magnetic flux density using injection current nonlinear encoding (ICNE) in MREIT / Physiol. Meas 28 : 117 ~ 127
E.J. Woo / 1994 / Impedance tomography using internal current density distribution measured by nuclear magnetic resonance / SPIE 2299 : 377 ~ 385
H.J. Kim / 2007 / Conductivity imaging of canine brain using a 3 T MREIT system: postmortem experiments / Physiol. Meas 28 : 1341 ~ 1353
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