Tissue Cooling and its Effect on Brightness Temperatures by Contact-Type Microwave Applicators

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Abstract
Contact of an applicator on the skin surface may cool the tissues so that the resulting brightness temperature measured by the applicator is varied. The tissue cooling effect on the brightness temperature was quantitatively evaluated. From the experimental results, it was concluded that an accurate temperature control was needed in order to reduce the errors in the brightness temperature. A new method of temperature control which permits continuous measurement of the thermal responses of a human body was attempted, and advantages and disadvantages of the method are discussed. The research results may be practical and useful for the accurate measurement of brightness temperature.