ABSTRACT
This chapter deals with thermal level and spacial selectivity of the hyperthermia, as shall see, must be controlled by a rigorous thermal dosimetry. The hyperthermia uses radioelectric waves, which often are affected by radio communication. These types of electromagnetic energy waves are devoted to numerous uses: civil aviation, spatial research, army, police, meteorology, wireless stations, telecommunication, radioastronomy, and radiodiffusion. The very asymmetric shape of water molecules is the origin of their high polarity. The dipolar reorientation of water molecules is responsible for a great part of hyperthermia in microwave–submitted biological tissues. The hyperthermia hardware is comprised of generators and applicators. The advantages of high frequency hyperthermia are generally the greater penetration depth and the simple design of applicators. The reawakened interest in the use of hyperthermia in cancer therapy and the necessity of focalized ultrasound energy inside the tumor volume have stimulated new ultrasound clinical trials. The simulation of hyperthermia rests on the heat equation computation in biological tissues.
