A Multifrequency Water-filled Waveguide Application Thermal Dosimetry In Vivo (Short Paper)

A new horn-shaped waveguide hyperthermia applicator, operating in the range 300-1000 MHz, has been designed. The applicator is filled with deionized water acting as both a dielectric and a cooling fluid. Pretiminary tests indicate that proper heating can be achieved at frequencies of about 340,440, 560, and 690 MHz, A very low level of enviromental pollution was observed. Thermodosimetry has been carried ont on two young femate sheep. Measurements in vivo have been carried out using up to 5 temperature sensors in different positions. The results indicate the occurrence of different temperature trends if the water is maintained at 15, 23, 30, and 35°C.