Development of Magnetic Field Supply and Wireless Temperature Detection Unit for Hyperthermia

Abstract

Soft heating is a method of hyperthermia with few side effects. In this study, only the tumor is heated by inductively heating an implant of a thermosensitive ferromagnetic material embedded in the tumor from outside the body. We are developing a wireless temperature measurement system that detects the implant temperature wirelessly by detecting the change in implant permeability from the induced electromotive force of a pickup coil installed outside the body. However, when the distance between the excitation coil and the thermosensitive ferromagnetic material increases, the change in the magnetic field decreases, so a highly sensitive pickup coil is required. In this report, we prototyped a magnetic field application detection unit for verification that integrates an excitation coil and a pickup coil, and evaluated experimentally the validity of the coil shape and installation position.