Specific Absorption Rate Distribution in a Full-Scale Model of Man at 350 MHz

A computer-controlled scanning system and an implantable triaxial electric-field probe have been used to obtain maps of the specific absorption rate (SAR) in various cross sections of a full-scale model of man. The model was exposed to a 350-MHz plane wave that provided various orientations of the electric-field vector with respect to the body. The results obtained are in general agreement with previously published theoretical and experimental data. The SAR distributions in the torso and head were in relatively good agreement with cylindrical and spherical models, respectively. Enhanced absorption in the neck and the limbs, as previously found by the thermographic method, was observed. This study provides much more detailed information than previously available, with an absolute accuracy of +- 1 db.

[1]  C. Durney.  Electromagnetic dosimetry for models of humans and animals: A review of theoretical and numerical techniques , 1980, Proceedings of the IEEE.

[2]  A. Guy,et al.  Determination of Power Absorption in Man Exposed to High Frequency Electromagnetic Fields by Thermographic Measurements on Scale Models , 1976, IEEE Transactions on Biomedical Engineering.

[3]  O. Gandhi,et al.  Numerical Calculation of Electromagnetic Energy Deposition for a Realistic Model of Man , 1979 .

[4]  O. Gandhi,et al.  Head Resonance: Numerical Solutions and Experimental Results , 1979 .

[5]  A. W. Guy,et al.  Analyses of Electromagnetic Fields Induced in Biological Tissues by Thermographic Studies on Equivalent Phantom Models , 1971 .

[6]  O. Gandhi,et al.  State of the knowledge for electromagnetic absorbed dose in man and animals , 1980, Proceedings of the IEEE.

[7]  R. J. Spiegel,et al.  The Thermal Response of a Human in the Near-Zone of a Resonant Thin-Wire Antenna , 1982 .

[8]  S S Stuchly,et al.  Computer-based scanning system for electromagnetic dosimetry. , 1983, The Review of scientific instruments.

[9]  M. Stuchly.  Dosimetry of Radio Frequency and Microwave Radiation: Theoretical Analyses , 1983 .

[10]  K. Chen,et al.  Induced EM fields inside human bodies irradiated by EM waves of up to 500 MHz. , 1977, The Journal of microwave power.

[11]  Kun-Mu Chen,et al.  Internal EM Field and Absorbed Power Density in Human Torsos Induced by 1-500-MHz EM Waves , 1977 .

[12]  Maria A. Stuchly,et al.  Implantable Electric-Field Probes - Some Performance Characteristics , 1984, IEEE Transactions on Biomedical Engineering.

[13]  R. Olsen,et al.  Far-field dosimetric measurements in a full-sized man model at 2.0 GHz. , 1982, Bioelectromagnetics.