Miniaturization of micro implantable devices with thermosensitive ferrite for soft-heating hyperthermia

The soft heating method is one technique utilized in hyperthermia treatment. The heater that consists of thermosensitive ferrite is implanted into the body, and heated by high-frequency magnetic field. This study applies the soft heating method. A complex type of heater composed of thermosensitive ferrite wound on a metallic ring is created. This complex type of heater produces heat due to losses of hysteresis and inductive current than thermosensitive ferrite alone. Further, this heater can control the temperature of the heater by using the Curie-point. For this technique, it is necessary to miniaturize the heater and provide safety high performance. We applied the method of miniaturization to plating. The effect of plating is examined. As a result, we have approximated to the optimal thickness of the metallic ring.