Interstitial microwave antennas for thermal therapy.
This paper presents a new microwave antenna design with improved heating at the tip for interstitial hyperthermia and thermocoagulation. Temperature distribution patterns surrounding a conventional insulated antenna and the new sleeved coaxial slot radiator are measured in a saline phantom under transient and steady-state conditions. The new design provides an improved steady-state temperature distribution over the active region of the radiator. In contrast to the cold zone at the tip of a conventional insulated antenna the new sleeved coaxial slot antenna provides maximal (sixfold greater) power deposition at its tip.
D004867:Equipment Design; D006358:Hot Temperature / Q000627:therapeutic use*; D006801:Humans; D008872:Microwaves; D008961:Models, Structural; D013814:Thermal Conductivity