Thermal Modeling of Millimeter Wave Energy and Heat Transfer in Skin
Final rept. 15 Feb 2006-31 May 2008
TRINITY UNIV SAN ANTONIO TX
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A thermal modeling algorithm was developed to predict the heat movement in rat skin continuously exposed for up to 60 minutes with 94 or 35 GHz millimeter radiofrequency radiation. The power densities applied were 50, 75, or 100 mWcm2 at either 23 or 33 deg. C ambient temperature. The rat skin was viewed as stratified layers of dimensions 40 microns epidermis, 100 microns papillary dermis, 600 microns reticular dermis, and 560 microns of hypodermis consisting of striated muscle, adipose, and connective tissue. 1.3 mm of skin depth encompasses the majority of tissue heat absorption at these frequencies and includes the dermal hypodermal interface where the greatest RFR-induced histological change took place. The six RFR exposure conditions encompass a range of rat thermal response ranging from tissue lesions and death to little response. Rats received isoflurane anesthesia, which in turn induced produced anesthesia hypothermia. Ways to adjust for this hypothermic response were sought in order to develop better verification procedures for the thermal model.
- Anatomy and Physiology