Author/Editor		Mason, Patrick A; Hurt, William D; Walters, Thomas J; D'Andrea, John A; Gajšek, Peter; Ryan, Kathy L; Nelson, David A; Smith, Kristen I; Ziriax, John M
Title		Effetcts of frequency, permittivity, and voxel size on predicted specific absorption rate values in biological tissue during electromagnetic-field exposure
Type		članek
Source		IEEE Trans Microwave Theor Tech
Vol. and No.		Letnik 48, št. 11
Publication year		2000
Volume		str. 2050-8
Language		eng
Abstract		Current electromagnetic-field (EMF) exposure limits have been based, in part, on the amount of energy absorbed by the whole body However, it is known that energy is absorbed nonuniformly during EMF exposure. The development and widespread use of sophisticated three-dimensional anatomical models to calculate specific-absorption-rate (SAR) values in biological material has resulted in the need to understand how model parameters affect predicted SAR values. This paper demonstrate the effects of manipulating frequency, permittivity values, and voxel size on SAR values calculated by a finite-difference time-domain program in digital homogenous sphere models and heterogeneous models of rat and man. The predicted SAR values are compared to empirical data from infrared thermography and implanted temperature probes.
Descriptors		ELECTROMAGNETIC FIELDS RADIO WAVES RADIATION DOSAGE RATS, SPRAGUE-DAWLEY DISEASE MODELS, ANIMAL COMPUTER SIMULATION WHOLE-BODY IRRADIATION DOSE-RESPONSE RELATIONSHIP, RADIATION