E-field distribution improvement by new hyperthermia applicators

It is well known that the hyperthermia (HT) treatment method in cancer therapy makes use of the controlled electromagnetic heating in the patient´s body. With regard to the deep body hyperthermia therapy, we have reviewed in this paper the most recent technology and technique of electromagnetic deep heating (Sigma-Eye applicator) based on annular phased arrays (APA) antennas. In order to improve the performance of the Sigma-Eye applicator, a new profile of the antenna was designed using a substrate material with high permittivity. The good results of the simulations compared with the classical Sigma-Eye applicator in terms of SAR deposition and focus capability lead us to further improvements of both the heat generation devices and the treatment planning methods.