Approximation of Surface-SAR in a Realistic Head Model for Microwave Exposure Using External Magnetic Near-Field
Summary :
A method is described for approximately estimating the surface specific-absorption-rate (SAR) in an anatomically realistic model of the human head for microwave exposure using the external magnetic near-field. The finite-difference time-domain (FD-TD) technique is used to compute the electromagnetic fields in the head model for 750-MHz and 1.5-GHz far-field exposures with the 1991 ANSI specified safety level. The spatial pattern tracking between the one-gram averaged surface-SAR and external magnetic near-field is demonstrated on the horizontal cross sectional perimeter of the head model. The regression coefficients between them are also obtained on the fifty-five horizontal cross sectional perimeters, which could give an approximate value of the surface-SAR in an acutual head, if the external magnetic near-field would be measured. This is validated by the theoretical results in a semi-infinite homogeneous flat model for normal incidence microwave exposure.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E78-B No.2 pp.140-144
- Publication Date
- 1995/02/25
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- Online ISSN
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- Type of Manuscript
- Special Section PAPER (Special Issue on Electromagnetic Compatibility)
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Osamu FUJIWARA, Michihiko NOMURA, "Approximation of Surface-SAR in a Realistic Head Model for Microwave Exposure Using External Magnetic Near-Field" in IEICE TRANSACTIONS on Communications,
vol. E78-B, no. 2, pp. 140-144, February 1995, doi: .
Abstract: A method is described for approximately estimating the surface specific-absorption-rate (SAR) in an anatomically realistic model of the human head for microwave exposure using the external magnetic near-field. The finite-difference time-domain (FD-TD) technique is used to compute the electromagnetic fields in the head model for 750-MHz and 1.5-GHz far-field exposures with the 1991 ANSI specified safety level. The spatial pattern tracking between the one-gram averaged surface-SAR and external magnetic near-field is demonstrated on the horizontal cross sectional perimeter of the head model. The regression coefficients between them are also obtained on the fifty-five horizontal cross sectional perimeters, which could give an approximate value of the surface-SAR in an acutual head, if the external magnetic near-field would be measured. This is validated by the theoretical results in a semi-infinite homogeneous flat model for normal incidence microwave exposure.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e78-b_2_140/_p
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@ARTICLE{e78-b_2_140,
author={Osamu FUJIWARA, Michihiko NOMURA, },
journal={IEICE TRANSACTIONS on Communications},
title={Approximation of Surface-SAR in a Realistic Head Model for Microwave Exposure Using External Magnetic Near-Field},
year={1995},
volume={E78-B},
number={2},
pages={140-144},
abstract={A method is described for approximately estimating the surface specific-absorption-rate (SAR) in an anatomically realistic model of the human head for microwave exposure using the external magnetic near-field. The finite-difference time-domain (FD-TD) technique is used to compute the electromagnetic fields in the head model for 750-MHz and 1.5-GHz far-field exposures with the 1991 ANSI specified safety level. The spatial pattern tracking between the one-gram averaged surface-SAR and external magnetic near-field is demonstrated on the horizontal cross sectional perimeter of the head model. The regression coefficients between them are also obtained on the fifty-five horizontal cross sectional perimeters, which could give an approximate value of the surface-SAR in an acutual head, if the external magnetic near-field would be measured. This is validated by the theoretical results in a semi-infinite homogeneous flat model for normal incidence microwave exposure.},
keywords={},
doi={},
ISSN={},
month={February},}
Copy
TY - JOUR
TI - Approximation of Surface-SAR in a Realistic Head Model for Microwave Exposure Using External Magnetic Near-Field
T2 - IEICE TRANSACTIONS on Communications
SP - 140
EP - 144
AU - Osamu FUJIWARA
AU - Michihiko NOMURA
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E78-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 1995
AB - A method is described for approximately estimating the surface specific-absorption-rate (SAR) in an anatomically realistic model of the human head for microwave exposure using the external magnetic near-field. The finite-difference time-domain (FD-TD) technique is used to compute the electromagnetic fields in the head model for 750-MHz and 1.5-GHz far-field exposures with the 1991 ANSI specified safety level. The spatial pattern tracking between the one-gram averaged surface-SAR and external magnetic near-field is demonstrated on the horizontal cross sectional perimeter of the head model. The regression coefficients between them are also obtained on the fifty-five horizontal cross sectional perimeters, which could give an approximate value of the surface-SAR in an acutual head, if the external magnetic near-field would be measured. This is validated by the theoretical results in a semi-infinite homogeneous flat model for normal incidence microwave exposure.
ER -
English
