Optimization of the EM heating cycle by using a dual frequency local hyperthermia applicator

Abstract

In order to optimize the heating duty cycle of the local hyperthermia applicators, we propose the dual frequency applicator instead of the well used single frequency applicator; it can be obtained by implementing the MW aperture source (axial or circumferential operating at 915 MHz) at the surface of the shortwave concentric loop (i.e., the magnetrode operating at 27.12 MHz). The numerical results on a simulated biological tissue show that this dual frequency applicator (or the coupled discrete oscillator) is able to enhance the penetration depth and also able to reduce the treatment period and the side effects such as the overheat of the subcutaneous normal tissue.