Inductive heating of ferrite powder by alternating magnetic field for Thermal Coagulation Therapy

Abstract

The purpose of this report is to investigate the heating effect of agar phantom containing ferrite powder by applying external AC magnetic field. Mg ferrite is most applicable for local hyperthermia. When using AC magnetic field with a frequency of 190 to 700kHz, the higher the frequency can increase the temperature of agarphantom containing 3.0 and 5.0% Mg ferrite powder. Even to the same weight of ferrite powder, the lager heat generation is obtained at the larger powder size. Moreover, a slight difference of distribution of ferrite powder has marked effects on the maximum temperature in vivo.