Whole-body hyperthermia, with the exception of the head, overheats the entire body using water-filtered infrared radiators. The body temperature reaches values between 39.5 ° C and 40.5 ° C. In locoregional deep hyperthermia, only the affected tissue or organ is overheated to a maximum of 44 degrees Celsius. The treatment of the prostate by transurethral hyperthermia has a special significance. In addition to the heat, an electric field of short radio waves is built up.