Specific absorption rates and induced current distributions in an anatomically based human model for plane-wave exposures.
We have previously reported local, layer-averaged, and whole-body-averaged specific absorption rates and induced currents for a 5,628-cell anatomically based model of a human for plane-wave exposures 20-100 MHz (Chen and Gandhi 1989). Using a higher resolution, 45,024-cell model of the human body, calculations have now been extended to 915 MHz using the finite-difference time-domain method. Because of the higher resolution of the model, it has been possible to calculate specific absorption rates for various organs (brain, eyes, heart, lungs, liver, kidneys, and intestines) and for various parts of the body (head, neck, torso, legs, and arms) as a function of frequency in the band 100-915 MHz. Consistent with some of the experimental data in the literature, the highest part-body-averaged specific absorption rate for the head and neck region (as well as for the eyes and brain) occurs at 200 MHz for the isolated condition and at 150 MHz for the grounded condition of the model. Also observed is an increasing specific absorption rate for the eyes for frequencies above 350 MHz due to the superficial nature of power deposition at increasing frequencies.
Gandhi
O P
OP
Department of Electrical Engineering, University of Utah, Salt Lake City 84112.
Gu
Y G
YG
Chen
J Y
JY
Bassen
H I
HI
D000465:Algorithms; D004735:Energy Transfer; D004781:Environmental Exposure; D006801:Humans; D008953:Models, Anatomic; D015233:Models, Statistical; D008961:Models, Structural; D011829:Radiation Dosage; D011846:Radio Waves