Predicted SAR in sprague-dawley rat as a function of permittivity values

Specific absorption rate (SAR) value is dependent on permittivity value. However, variability in the published permittivity values for human and animal tissue and the development of sophisticated 3‐dimensional digital anatomical models to predict SAR values has resulted in the need to understand how...

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Bibliographic Details
Published in:Bioelectromagnetics 2001-09, Vol.22 (6), p.384-400
Main Authors: Gajšek, P., Ziriax, J.M., Hurt, W.D., Walters, T.J., Mason, P.A.
Format: Article
Language:English
Subjects:
Animals
dielectric values
dosimetry
Electromagnetic Fields
electromagnetic fields (EMF)
finite-diference time-domain (FDTD)
Male
Models, Anatomic
Muscle, Skeletal - radiation effects
Organ Specificity
Radiation Dosage
radio frequency
Radio Waves
Rats
Rats, Sprague-Dawley
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Summary:Specific absorption rate (SAR) value is dependent on permittivity value. However, variability in the published permittivity values for human and animal tissue and the development of sophisticated 3‐dimensional digital anatomical models to predict SAR values has resulted in the need to understand how model parameters (permittivity value) affect the predicted whole body and localized SAR values. In this paper, we establish the partial derivative of whole body SARs and localized SAR values (defined as SAR for individual organs with respect to a change in the permittivity values of all tissue types, as well as for those tissues with the most variable permittivity values. Variations in the published permittivity values may substantially influence whole body and localized SAR values, but only under special conditions. Orientation of the exposed object to the incident electromagnetic wave is one of the most crucial factors. Bioelectromagnetics 22:384–400, 2001. Published 2001 Wiley‐Liss, Inc.
ISSN:0197-8462
1521-186X
DOI:10.1002/bem.66