| Presentation | 2018-10-18 Temperature Elevation for Brief Exposure in GHz Region Sachiko Kodera, Akimasa Hirata, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In international guideline/standard for protection from radio-frequency electromagnetic fields, the specific absorption rate (SAR) averaged over 10 g of tissue is used as a physical quantity to prevent local temperature elevation. The averaging time of SAR is set to 6 min for local exposure. The ICNIRP public consultation document introduced a new physical quantity, transmitted power density (TPD), as the basic restriction above 6 GHz. In addition, the limit for the specific absorption (SA) and transmitted energy density (TED) were set to avoid heating for brief exposures (shorter than the averaging time of 6 min). However, to our knowledge, no study evaluated the temperature elevation for single/multiple pulses whose energy satisfies that for 6-min continuous waves. This study computed the temperature elevation for brief pulse exposures based on bioheat computation. We first confirmed that the peak temperature elevation exceeds the steady-state temperature. We then proposed the limit of SA from the regression curve depending on the duration of brief-pulse(s) exposure. The time course of temperature elevation in the multi-layer cube model was computed for typical scenarios of multiple pulses exposures. The SA and TED based on the regression curve can be used as a metric to prevent excess temperature elevation for different brief exposure scenario. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Bioheat transfer equation / Temperature elevation / Brief exposure |
| Paper # | EMCJ2018-37,MW2018-73,EST2018-59 |
| Date of Issue | 2018-10-11 (EMCJ, MW, EST) |
| Conference Information | |
| Committee | EST / MW / EMCJ / IEE-EMC |
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| Conference Date | 2018/10/18(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hachinohe Chamber of Commerce and Industry(Hachinohe city, Aomori) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Simulation techniques, EMC, Microwave, Electromagnetic field simulation, etc. |
| Chair | Akimasa Hirata(Nagoya Inst. of Tech.) / Masahiro Muraguchi(TUS) / Osami Wada(Kyoto Univ.) / 山崎 健一(電中研) |
| Vice Chair | Shinichiro Ohnuki(Nihon Univ.) / Masayuki Kimishima(Advantest) / Jun Shibayama(Hosei Univ.) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTT DOCOMO) / Kenichi Tajima(Mitsubishi Electric) / Kensei Oh(Nagoya Inst. of Tech.) |
| Secretary | Shinichiro Ohnuki(CIST) / Masayuki Kimishima(National Inst. of Tech.,Sendai College) / Jun Shibayama(HITACHI) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(Tokyo Inst. of Tech.) / Kenichi Tajima(Mitsubishi Electric) / Kensei Oh(東北学院大) / (鉄道総研) |
| Assistant | Takahiro Ito(Nagoya Inst. of Tech.) / Kazuhiro Fujita(Fujitsu) / Mizuki Motoyoshi(Tohoku Univ.) / Satoshi Yoshida(Kagoshima Univ.) / Shinobu Nagasawa(Mitsubishi Electric) / Shinichiro Yamamoto(Univ. of Hyogo) / Takanori Unou(Denso) / 井渕 貴章(阪大) |
| Paper Information | |
| Registration To | Technical Committee on Electronics Simulation Technology / Technical Committee on Microwaves / Technical Committee on Electromagnetic Compatibility / Technical Meeting on Electromagnetic Compatibility (IEE-EMC) |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Temperature Elevation for Brief Exposure in GHz Region |
| Sub Title (in English) | |
| Keyword(1) | Bioheat transfer equation |
| Keyword(2) | Temperature elevation |
| Keyword(3) | Brief exposure |
| 1st Author's Name | Sachiko Kodera |
| 1st Author's Affiliation | Nagoya Institute of Technology(NIT) |
| 2nd Author's Name | Akimasa Hirata |
| 2nd Author's Affiliation | Nagoya Institute of Technology(NIT) |
| Date | 2018-10-18 |
| Paper # | EMCJ2018-37,MW2018-73,EST2018-59 |
| Volume (vol) | vol.118 |
| Number (no) | EMCJ-247,MW-248,EST-249 |
| Page | pp.pp.17-21(EMCJ), pp.17-21(MW), pp.17-21(EST), |
| #Pages | 5 |
| Date of Issue | 2018-10-11 (EMCJ, MW, EST) |