Transactions of Japanese Society for Medical and Biological Engineering
Online ISSN : 1881-4379
Print ISSN : 1347-443X
ISSN-L : 1347-443X
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Volume 51, Issue 3
Displaying 1-11 of 11 articles from this issue
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  • Measurement of the Anisotropy of Biological Tissues Using a Three-phase Electromagnetic Sensor
    Yukio KOSUGI, Tadashi TAKEMAE, Hiroki TAKESHIMA, Atsushi KUDO, Kazuyuk ...
    2013 Volume 51 Issue 3 Pages 224-231
    Published: June 10, 2013
    Released on J-STAGE: September 25, 2013
    DOIhttps://doi.org/10.11239/jsmbe.51.224
    JOURNAL FREE ACCESS
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    An electrical impedance method using three phase eddy currents is proposed to measure the electric anisotropy of some organs like the liver consisting of anisotropic substances. In this method, three electromagnets are used and placed in an equilateral triangle on the surface of the substance. Three phase alternative currents are applied to each coil of those three electromagnets, respectively, so that three phase eddy currents are produced at the center of the triangle in the substance. The superposed current of these three phase eddy currents is used to measure the impedance. Because the flow direction of this superposed current rotates through 360 degrees around the center of three magnets during one cycle of the alternative current, the anisotropic impedance can be measured. The detection of anisotropic impedance by the proposed method was confirmed with some model experiments and in-vivo measurements of the liver of pigs.
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