Design of a microwave array hyperthermia applicator with a semicircular reflector.
The design of a hyperthermia applicator for heating biological tissues is presented in which the applicator consists of an array antenna surrounded by a perfect electrically conducting reflector. The heat hazard to superficial tissues is reduced by the introduction of a dielectric protecting layer over them. A method of moments formulation is applied to approximate the electric field within the biological medium and a closed form expression is presented for the electromagnetic coupling problem, which enables an optimisation procedure to be performed. The applicator enhances both penetration and focusing: deep tumours, close to the bone region, are heated and the percentage of biologically healthy tissue exposed to a specific absorption rate (SAR) hazard level diminishes by 53.8%.
Sabariego
R V
RV
Dpto. Tecnoloxías das Comunicacións, Universidade de Vigo, Spain.
Landesa
L
L
Obelleiro
F
F
D003972:Diathermy / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D008954:Models, Biological; D009369:Neoplasms / Q000628:therapy*