Heating Properties of Ferrites by AC Magnetic Field for Local Hyperthermia of Cancer

Abstract

Recently, hyperthermia has been expected for a treatment of cancer tissues. In this case, the heating of cancer tissues keeps at about 42°C using AC magnetic field, since the heating at this temperature affects only the cancer cells and does not give a damage to normal cells. Heating properties under AC magnetic field were investigated for various ferrite powders. The maximum temperature was obtained when a frequency of AC magnetic field was about 370 kHz for all the samples examined. Mg-ferrite (MgFe₂O₄) showed the excellent temperature ehnancement compared with those of other ferrites.