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Microwave tumor ablation applicators in breast cancer, a SWR comparison study between two types of cable

Irving Hernández, Mario Francisco Cepeda, Geshel David Guerrero, Francisco Valdés, Francisco Flores, Lorenzo Leija, Arturo Vera


Background. This paper compares two types pf applicator for Microwave ablation in the same tissue. Microwave ablation is a minimally invasive technique for tumor destruction. Because the heat generated microwaves in adipose tissue and glandular tissue is less than the heat generated in the tumor. Additionally, this type of tissue has a high water content and microwaves can induce localized heating to destroy breast carcinomas selectively. There are several applicators for this kind of therapy.

Methods. In this text two applicators were compared. Both were built for the ablation of tumors in adipose tissue. Micro coaxial cable of two different diameters were used while the rest of the design parameters were the same. Both designs were analysed using COMSOL Multhypisics software to measure the standard wave ratio (SWR).

Results. Results from the simulation were compared to those obtained in phantom tumor, phantom breast and phantom tumor surrounded by breast.

Conclusions. The design chosen for the applicator was the slot type because it is a user-friendly design for its construction and has shown a good performance.


SWR, UT-85, UT-47, microwave therapy, breast cancer

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