Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models

The International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines and the IEEE C95.1 standard are currently under revision. In the guidelines/standard, the dominant effect for electromagnetic field exposures at frequencies above 100 kHz is the thermal effect. The whole-body-and 1...

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Autores principales:	Kenji Taguchi, Ilkka Laakso, Katsuaki Aga, Akimasa Hirata, Yinliang Diao, Jerdvisanop Chakarothai, Tatsuya Kashiwa
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2018
Materias:	Dosimetry biological effects of radiation standardization radiation safety Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/058ad8a7eb9841b3936ce3e4bd772547
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spelling	oai:doaj.org-article:058ad8a7eb9841b3936ce3e4bd7725472021-11-19T00:02:37ZRelationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models2169-353610.1109/ACCESS.2018.2880905https://doaj.org/article/058ad8a7eb9841b3936ce3e4bd7725472018-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/8532369/https://doaj.org/toc/2169-3536The International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines and the IEEE C95.1 standard are currently under revision. In the guidelines/standard, the dominant effect for electromagnetic field exposures at frequencies above 100 kHz is the thermal effect. The whole-body-and 10g-averaged specific absorption rates (SARs), which are surrogates for core and local temperature elevations, respectively, are set as metrics for exposure evaluation. The external field strengths or incident power density, corresponding to the limit for SARs, are also used as metrics for practical compliance purposes. Although the limits for the SARs are identical amongst the guidelines/standard, the limits for the external field strengths differ by a factor of 7.4–12.9 in an intermediate frequency range (100 kHz–100 MHz). Due to the fact that the standard/guidelines were published before the computation with anatomical human models was available, it is worth revisiting the relationship between the SARs and external field strengths by computations using the human models. Intercomparison using different numerical codes was also performed to verify the results. For the main finding, as expected, the 10g-averaged SAR was a less restrictive factor for whole-body exposure over the frequencies considered in this paper. It was also found that the relationship between SARs and external field strength was satisfied, but was more conservative in the ICNIRP guidelines, whereas there were slight discrepancies below 30 MHz in the IEEE standard. The computational results would be useful for revising the permissible external field strength based on scientific results.Kenji TaguchiIlkka LaaksoKatsuaki AgaAkimasa HirataYinliang DiaoJerdvisanop ChakarothaiTatsuya KashiwaIEEEarticleDosimetrybiological effects of radiationstandardizationradiation safetyElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 6, Pp 70186-70196 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dosimetry biological effects of radiation standardization radiation safety Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dosimetry biological effects of radiation standardization radiation safety Electrical engineering. Electronics. Nuclear engineering TK1-9971 Kenji Taguchi Ilkka Laakso Katsuaki Aga Akimasa Hirata Yinliang Diao Jerdvisanop Chakarothai Tatsuya Kashiwa Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
description	The International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines and the IEEE C95.1 standard are currently under revision. In the guidelines/standard, the dominant effect for electromagnetic field exposures at frequencies above 100 kHz is the thermal effect. The whole-body-and 10g-averaged specific absorption rates (SARs), which are surrogates for core and local temperature elevations, respectively, are set as metrics for exposure evaluation. The external field strengths or incident power density, corresponding to the limit for SARs, are also used as metrics for practical compliance purposes. Although the limits for the SARs are identical amongst the guidelines/standard, the limits for the external field strengths differ by a factor of 7.4–12.9 in an intermediate frequency range (100 kHz–100 MHz). Due to the fact that the standard/guidelines were published before the computation with anatomical human models was available, it is worth revisiting the relationship between the SARs and external field strengths by computations using the human models. Intercomparison using different numerical codes was also performed to verify the results. For the main finding, as expected, the 10g-averaged SAR was a less restrictive factor for whole-body exposure over the frequencies considered in this paper. It was also found that the relationship between SARs and external field strength was satisfied, but was more conservative in the ICNIRP guidelines, whereas there were slight discrepancies below 30 MHz in the IEEE standard. The computational results would be useful for revising the permissible external field strength based on scientific results.
format	article
author	Kenji Taguchi Ilkka Laakso Katsuaki Aga Akimasa Hirata Yinliang Diao Jerdvisanop Chakarothai Tatsuya Kashiwa
author_facet	Kenji Taguchi Ilkka Laakso Katsuaki Aga Akimasa Hirata Yinliang Diao Jerdvisanop Chakarothai Tatsuya Kashiwa
author_sort	Kenji Taguchi
title	Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
title_short	Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
title_full	Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
title_fullStr	Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
title_full_unstemmed	Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models
title_sort	relationship of external field strength with local and whole-body averaged specific absorption rates in anatomical human models
publisher	IEEE
publishDate	2018
url	https://doaj.org/article/058ad8a7eb9841b3936ce3e4bd772547
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_version_	1718420648625176576

Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models

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