Proceedings of the WOrld Congress on Medical Physics and Biomedical Engineering

The citotoxic effect of heating and the enhancemert of the radiotherapy effectiveness combined with hyperthermia has favouredt he development of technology for loco-regional treatments. For a better choose of hyperthermic treatment technique, measurements have been carried out, in order to characterize two differentunits: a couple of capacitive electrodes working at 13.56 MHz (M.M.E.) and a wave guide TEM working at 27 MHz (Aeritalia). The phantoms used were built using compositions suitable to simulate tissues dielectric constant and electric conductivity at the frequencies of interest. Measurements were carried out toi nvestigate the heating omogeneity and the possible existence of disperse fields and hot spots. These two different heating techniques are used in our Institution fo rpelvic tumors treatments.