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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.