A hyperthermia treatment device comprises paired multiple feed inductor rings positioned between two capacitor plates, for producing a tuned radiofrequency electromagnetic field. The spatial orientation of the elements and/or the phase of the current flowing through them is variable. Change in the spatial...http://www.google.de/patents/US4674481?utm_source=gb-gplus-sharePatent US4674481 - RF electromagnetic field generation apparatus for regionally-focused hyperthermia
