Dry phantom composed of ceramics and its application to SAR estimation

Author

Kobayashi, Takehiko ; Nojima, Toshio ; Yamada, Kenji ; Uebayashi, Shinji

Author_Institution

NTT Radio Commun. Syst. Lab., Kanagawa, Japan

Volume

41

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

136

Lastpage

140

Abstract

A dry phantom material having the same electric properties in the UHF band as biological tissues is developed. The new composite material is composed of microwave ceramic powder, graphite powder, and bonding resin. This material overcomes the various problems inherent in the conventional jelly phantom material, such as dehydration and deterioration due to invasion of bacteria or mold. This phantom material makes it possible to accomplish highly reliable and precise estimation of specific absorption rate (SAR) in biological systems. Dry phantom models of spheres and human heads are fabricated. Experiments are performed to estimate the SAR of human heads exposed to microwave sources by using the thermography method. Since this material removes the necessity of the phantom shell, the surface SAR distribution can be readily obtained

Keywords

biological effects of fields; biological effects of microwaves; biological techniques and instruments; ceramics; composite materials; graphite; SAR estimation; UHF band; biological tissues; bonding resin; composite material; dry phantom material; electric properties; graphite powder; microwave ceramic powder; specific absorption rate; thermography method; Biological materials; Biological tissues; Bonding; Ceramics; Composite materials; Humans; Imaging phantoms; Microorganisms; Powders; Resins;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.210240

Filename

210240