| 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
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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 |
