Accession Number : AD0681254

Title :   DETERMINATION OF THE COEFFICIENT OF REFLECTION FOR MULTILAYERED SYSTEMS OF BIOLOGICAL TISSUES IN THE MICROWAVE RANGE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Livenson,A. R.

Report Date : 03 MAY 1968

Pagination or Media Count : 15

Abstract : The coincidence of the results of experimental measurements of the coefficient of reflection with calculated data showed the feasibility of the practical use of analytic and graphic-analytic methods of calculation. A graphic-analytic method is preferred because of its simplicity and visualizability. We can take 50% as the average value of the energy reflected from the body surface for frequencies that are applicable in medicine (the microwave range of 460-2375 MHz). Depending upon the individual characteristics in skin and fat thicknesses, at 460 MHz this magnitude can vary within the limits of 35-63%, and 2375 MHz, within the limits of 25-76%. A quarter-wave matching layer (for example, a 1 cm thick Mycalex plate) significantly increases the percentage of energy absorbed by the body tissues during microwave therapy in the 12 cm range. (Author)

Descriptors :   (*RADIOTHERAPY, *MICROWAVES), ELECTROMAGNETIC WAVE REFLECTIONS, GRAPHICS, RADIATION DOSAGE, USSR

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE