Heating Performance of Soft-heating Element with LC-booster for Invasive Hyperthermia Therapy

Abstract

The soft-heating method is an implantable hyperthermia method that can control the ultimate temperature of heating elements by using the Curie temperature of the magnetic material used in the element. It is a safe heating method. High heat generation has been achieved for heating elements by forming a metal ring around a core made of a ferrite-based magnetic material having a low Curie temperature. However, to generate a magnetic flux for heating deep inside the body, an exciting coil with a high withstand voltage and large allowable current has been required. In this research, we reduce the load on the exciting system, by developing a novel heating element using the LC-booster method. This wireless power transfer technology is excellent in matching with the load resistance and is proposed as a method for improving the performance of the heating element itself. Our proposed LC-booster method has better heat generation performance than the conventional methods. In addition, we prove that the performance could be improved by increasing the resonant frequency.