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Main Title Frequency-Dependent Absorption of Electromagnetic Energy in Biological Tissue.
Author Joines, W. T. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Experimental Biology Div.
Year Published 1984
Report Number EPA-600/J-84-023;
Stock Number PB84-201920
Additional Subjects Electromagnetic radiation ; Absorption ; Tissues(Biology) ; Neoplasms ; Reprints ; Bioaccumulation
Library Call Number Additional Info Location Last
NTIS  PB84-201920 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
Abstract The frequency-dependent absorption of electromagnetic energy in biological tissue is illustrated by use of the Debye equations, model calculations for different irradiation conditions, and measured electrical properties (conductivity and permittivity) of different tissues. Four separate irradiation conditions are treated for calculating the power absorbed in a given tissue when it forms a flat interface or is surrounded by another tissue. The calculations show that the greatest differential absorption occurs at frequencies between the dominant relaxation frequencies in the two tissues. From rat mammary gland tumor data, the calculations show an optimum frequency range of about 100-500 MHz for microwave hyperthermia treatment of at least these types of tumor.
Supplementary Notes Pub. in IEEE Transactions on Biomedical Engineering v31 n1 p17-20 1984.
NTIS Title Notes Journal article.
Title Annotations Reprint: Frequency-Dependent Absorption of Electromagnetic Energy in Biological Tissue.
PUB Date Free Form 1984
Category Codes 6R; 6E; 57V; 57O
NTIS Prices PC A02/MF A01
Primary Description 600/11
Document Type NT
Cataloging Source NTIS/MT
Control Number 424416849
Origin NTIS
Type CAT