This paper describes 3 different stages: Modeling, Construction and Preliminary Evaluation of a superficial applicator, with a new coaxially fed antenna, for its use in oncology hyperthermia treatments. Modeling stage was developed by the Finite Element Method, using Maxwell and Bioheat equations; here, antenna dimensions were optimized. In the second stage, the optimized applicator was constructed in aluminum and copper, taking in count results achieved in the modeling stage. Finally, it was characterized for its clinical use. SWR, incident and reflected waves and calorimetric measurements are presented in this paper.

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The aim of this work is the development of a tumor phantom to be inserted in an in vitro tissue. This combination of phantom and fresh tissue can be used to evaluate and verify the effects of hyperthermia equipments during the treatments. The tumor phantom was characterized and modified to achieve the ultrasonic and dielectric properties of a real tumor. The tumor phantom components were agarose, ethanol, tri-distilled water and chloride of sodium. The permittivity and conductivity values were 73.68 ± 0.78 and 0.31 ± 0.025 S/m @ 225 MHz respectively and the speed of sound and attenuation were 1588.28 ± 15.72 m/s and 1.28 ± 0.045 dB/(cm MHz) at 20°C. Keywords-- Tumor Phantom, Ultrasound, ElectromagnetismA portion of this mixture was poured in a mould; when the liquid phantom solidified, it was stored in water to avoid

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