2018 Volume 42 Issue 3 Pages 90-95
Heating mediators for magnetic hyperthermia treatment (MHT) are dependent on magnetic field strength. Therefore, a hyperthermia applicator that generates a homogeneous magnetic field is required. We fabricated a 50 mm gap magnetic field generator (hereinafter called the 50 mm prototype), and the guideline for optimizing combination of parameters of the resonant circuit was suggested to maximize the estimated heating index (product of frequency and magnetic field strength). We found that a 7×2-turn coil is optimal for the 50 mm prototype. We consider that this optimization method is applicable for designing a full-scale hyperthermia applicator. The uniformity of magnetic field strength distribution in the 50 mm prototype was measured by a pickup coil, and we show experimentally that magnetic circuit type magnetic field generator is appropriate for the MHT applicator. The feasibility of a full-scale MHT applicator was increased by the suggestion of guideline for high-estimated heating index operation and the demonstration of magnetic field homogeneity.
