Infrared fibers for radiometer thermometry in hypothermia and hyperthermia treatment

One severe problem with heating in hypothermia and hyperthermia treatment is the accurate measurement and control of temperature in the presence of a strong electromagnetic field. For this purpose, a fiber-optic radiometer system based on a nonmetallic, infrared fiber probe, which can operate either in contact or noncontact mode, has been developed. In preliminary investigations, the radiometer worked well in a strong microwave or radiofrequency field, with an accuracy of +or-0.5 degrees C. This fiber-optic thermometer was used to control the surface temperature of objects within +or-2 degrees C.