| Presentation | 2016-12-16 Non-contact Measurement of the Dielectric Properties of Biological Tissues at 100 - 1000 kHz Shiro Kawai, Kenji Shiba, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The recent development of techniques such as wireless power transfer has led to increasing concerns about adverse effects of electromagnetic fields on the body. To evaluate theses effects, the dielectric properties of biological tissues must be determined. However, typical dielectric properties have a level of uncertainty when measured at frequencies below 1000 kHz because of the polarized capacitor values caused by the contact between the measurement probe or electrodes and the sample. A non-contact measuring method was developed using two transformers and a measuring case which can measure the dielectric properties of biological samples. The voltage ratio of the primary and tertiary coil V1/V3 and phase difference of the primary and tertiary coil θ1-θ3 were measured when the measuring case was filled with the NaCl solution (σ = 0.476 S/m) and used as a secondary coil. First, the voltage ratio and phase difference were measured when the lumped parameter elements, which have accurate values, were used as a secondary coil. Then, the conductivity σ and permittivity εr of the NaCl solution were obtained by comparing V1/V3 and θ1-θ3. As a result, σ = 0.476 S/m, εr = 3227 were obtained. Second, an equivalent circuit with two transformers and a measuring case was designed and calculated. The values σ = 0.476 S/m, εr = 12100 were obtained by comparing the measured results of the NaCl solution and the calculated results. The results indicate that our measurement method has the potential to measure the dielectric properties of biological tissues. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Biological tissues / Dielectric properties / Non-contact measurement |
| Paper # | EMCJ2016-101 |
| Date of Issue | 2016-12-09 (EMCJ) |
| Conference Information | |
| Committee | EMCJ / IEE-EMC |
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| Conference Date | 2016/12/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Power electronics, Biomedical EMC, EMC |
| Chair | Hideaki Sone(Tohoku Univ.) / Ken Kawamata(Tohoku-gakuin Univ.) |
| Vice Chair | Osami Wada(Kyoto Univ.) |
| Secretary | Osami Wada(AIST) / (Hitachi Automotive Systems) |
| Assistant | Yoshiki Kayano(Univ. of Electro-Comm.) / Yusaku Katsube(Hitachi) / Chie Sasaki(Panasonic) / Yu-ichi Hayashi(Tohoku-gakuin Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Electromagnetic Compatibility / Technical Meeting on Electromagnetic Compatibility |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Non-contact Measurement of the Dielectric Properties of Biological Tissues at 100 - 1000 kHz |
| Sub Title (in English) | Simulation Using an Equivalent Circuit |
| Keyword(1) | Biological tissues |
| Keyword(2) | Dielectric properties |
| Keyword(3) | Non-contact measurement |
| 1st Author's Name | Shiro Kawai |
| 1st Author's Affiliation | Tokyo University of Science(TUS) |
| 2nd Author's Name | Kenji Shiba |
| 2nd Author's Affiliation | Tokyo University of Science(TUS) |
| Date | 2016-12-16 |
| Paper # | EMCJ2016-101 |
| Volume (vol) | vol.116 |
| Number (no) | EMCJ-370 |
| Page | pp.pp.13-18(EMCJ), |
| #Pages | 6 |
| Date of Issue | 2016-12-09 (EMCJ) |