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| Presentation | 2018-10-18 11:35 Temperature Elevation for Brief Exposure in GHz Region Sachiko Kodera, Akimasa Hirata (NIT)  EMCJ2018-37 MW2018-73 EST2018-59 Link to ES Tech. Rep. Archives: MW2018-73 EST2018-59 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | Bioheat transfer equation / Temperature elevation / Brief exposure / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 249, EST2018-59, pp. 17-21, Oct. 2018. | |
| Paper # | EST2018-59 | |
| Date of Issue | 2018-10-11 (EMCJ, MW, EST) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | EMCJ2018-37 MW2018-73 EST2018-59 Link to ES Tech. Rep. Archives: MW2018-73 EST2018-59 |
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| Conference Information | |
| Committee | EST MW EMCJ IEE-EMC |
| Conference Date | 2018-10-18 - 2018-10-19 |
| 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. |
| Paper Information | |
| Registration To | EST |
| Conference Code | 2018-10-EST-MW-EMCJ-EMC |
| Language | English (Japanese title is available) |
| 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 |
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| 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) |
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| Speaker | Author-1 |
| Date Time | 2018-10-18 11:35:00 |
| Presentation Time | 25 minutes |
| Registration for | EST |
| Paper # | EMCJ2018-37, MW2018-73, EST2018-59 |
| Volume (vol) | vol.118 |
| Number (no) | no.247(EMCJ), no.248(MW), no.249(EST) |
| Page | pp.17-21 |
| #Pages | 5 |
| Date of Issue | 2018-10-11 (EMCJ, MW, EST) |
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