Quantification and Verification of Whole-Body-Average SARs in Small Animals Exposed to Electromagnetic Fields inside Reverberation Chamber

Jingjing SHI; Jerdvisanop CHAKAROTHAI; Jianqing WANG; Kanako WAKE; Soichi WATANABE; Osamu FUJIWARA

doi:10.1587/transcom.E97.B.2184

Quantification and Verification of Whole-Body-Average SARs in Small Animals Exposed to Electromagnetic Fields inside Reverberation Chamber

Jingjing SHI, Jerdvisanop CHAKAROTHAI, Jianqing WANG, Kanako WAKE, Soichi WATANABE, Osamu FUJIWARA

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This paper aims to achieve a high-quality exposure level quantification of whole-body average-specific absorption rates (WBA-SARs) for small animals in a medium-size reverberation chamber (RC). A two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC-type exposure system, has been used as an evaluation method to determine the whole-body exposure level in small animals. However, there is little data that quantitatively demonstrate the validity and accuracy of this method in an RC up to now. In order to clarify the validity of the two-step method, we compare the physical quantities in terms of electric field strength and WBA-SARs by using a direct numerical assessment method known as the method of moments (MoM) with ten homogenous gel phantoms placed in an RC with 2GHz exposure. The comparison results show that the relative errors between the two-step method and the MoM approach are approximately below 10%, which reveals the validity and usefulness of the two-step technique. Finally, we perform a dosimetric analysis of the WBA-SARs for anatomical mouse models with the two-step method and determine the input power related to our developed RC-exposure system to achieve a target exposure level in small animals.

Publication: IEICE TRANSACTIONS on Communications Vol.E97-B No.10 pp.2184-2191

Publication Date: 2014/10/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E97.B.2184

Type of Manuscript: PAPER

Category: Electromagnetic Compatibility(EMC)

Authors

Jingjing SHI
  Nagoya Institute of Technology
Jerdvisanop CHAKAROTHAI
  National Institute of Information and Communication Technology
Jianqing WANG
  Nagoya Institute of Technology
Kanako WAKE
  National Institute of Information and Communication Technology
Soichi WATANABE
  National Institute of Information and Communication Technology
Osamu FUJIWARA
  Nagoya Institute of Technology

Keyword

specific absorption rate (SAR), reverberation-chamber (RC), exposure system, finite-difference time-domain (FDTD) method, method of moments (MoM)

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Jingjing SHI, Jerdvisanop CHAKAROTHAI, Jianqing WANG, Kanako WAKE, Soichi WATANABE, Osamu FUJIWARA, "Quantification and Verification of Whole-Body-Average SARs in Small Animals Exposed to Electromagnetic Fields inside Reverberation Chamber" in IEICE TRANSACTIONS on Communications, vol. E97-B, no. 10, pp. 2184-2191, October 2014, doi: 10.1587/transcom.E97.B.2184.
Abstract: This paper aims to achieve a high-quality exposure level quantification of whole-body average-specific absorption rates (WBA-SARs) for small animals in a medium-size reverberation chamber (RC). A two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC-type exposure system, has been used as an evaluation method to determine the whole-body exposure level in small animals. However, there is little data that quantitatively demonstrate the validity and accuracy of this method in an RC up to now. In order to clarify the validity of the two-step method, we compare the physical quantities in terms of electric field strength and WBA-SARs by using a direct numerical assessment method known as the method of moments (MoM) with ten homogenous gel phantoms placed in an RC with 2GHz exposure. The comparison results show that the relative errors between the two-step method and the MoM approach are approximately below 10%, which reveals the validity and usefulness of the two-step technique. Finally, we perform a dosimetric analysis of the WBA-SARs for anatomical mouse models with the two-step method and determine the input power related to our developed RC-exposure system to achieve a target exposure level in small animals.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.2184/_p

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@ARTICLE{e97-b_10_2184,
author={Jingjing SHI, Jerdvisanop CHAKAROTHAI, Jianqing WANG, Kanako WAKE, Soichi WATANABE, Osamu FUJIWARA, },
journal={IEICE TRANSACTIONS on Communications},
title={Quantification and Verification of Whole-Body-Average SARs in Small Animals Exposed to Electromagnetic Fields inside Reverberation Chamber},
year={2014},
volume={E97-B},
number={10},
pages={2184-2191},
abstract={This paper aims to achieve a high-quality exposure level quantification of whole-body average-specific absorption rates (WBA-SARs) for small animals in a medium-size reverberation chamber (RC). A two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC-type exposure system, has been used as an evaluation method to determine the whole-body exposure level in small animals. However, there is little data that quantitatively demonstrate the validity and accuracy of this method in an RC up to now. In order to clarify the validity of the two-step method, we compare the physical quantities in terms of electric field strength and WBA-SARs by using a direct numerical assessment method known as the method of moments (MoM) with ten homogenous gel phantoms placed in an RC with 2GHz exposure. The comparison results show that the relative errors between the two-step method and the MoM approach are approximately below 10%, which reveals the validity and usefulness of the two-step technique. Finally, we perform a dosimetric analysis of the WBA-SARs for anatomical mouse models with the two-step method and determine the input power related to our developed RC-exposure system to achieve a target exposure level in small animals.},
keywords={},
doi={10.1587/transcom.E97.B.2184},
ISSN={1745-1345},
month={October},}

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TY - JOUR
TI - Quantification and Verification of Whole-Body-Average SARs in Small Animals Exposed to Electromagnetic Fields inside Reverberation Chamber
T2 - IEICE TRANSACTIONS on Communications
SP - 2184
EP - 2191
AU - Jingjing SHI
AU - Jerdvisanop CHAKAROTHAI
AU - Jianqing WANG
AU - Kanako WAKE
AU - Soichi WATANABE
AU - Osamu FUJIWARA
PY - 2014
DO - 10.1587/transcom.E97.B.2184
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2014
AB - This paper aims to achieve a high-quality exposure level quantification of whole-body average-specific absorption rates (WBA-SARs) for small animals in a medium-size reverberation chamber (RC). A two-step method, which incorporates the finite-difference time-domain (FDTD) numerical solutions with electric field measurements in an RC-type exposure system, has been used as an evaluation method to determine the whole-body exposure level in small animals. However, there is little data that quantitatively demonstrate the validity and accuracy of this method in an RC up to now. In order to clarify the validity of the two-step method, we compare the physical quantities in terms of electric field strength and WBA-SARs by using a direct numerical assessment method known as the method of moments (MoM) with ten homogenous gel phantoms placed in an RC with 2GHz exposure. The comparison results show that the relative errors between the two-step method and the MoM approach are approximately below 10%, which reveals the validity and usefulness of the two-step technique. Finally, we perform a dosimetric analysis of the WBA-SARs for anatomical mouse models with the two-step method and determine the input power related to our developed RC-exposure system to achieve a target exposure level in small animals.
ER -