Theoretical and experimental comparison of three types of electromagnetic hyperthermia applicator.
There is evidence that heating of malignant tissue in the treatment of cancer may be beneficial and so the performance of different applicator designs needs to be established. A theoretical model of the dielectric loaded waveguide applicator is compared with models of two other applicators which depend on energy radiated from conductors carrying high frequency current. The latter are exemplified by the compact resonant patch applicator and the lightweight inductive current sheet applicator. It is shown that heating profiles and field penetration of each applicator are similar for equal radiating areas, and these results have been substantiated experimentally. Impedance match as a function of frequency and load is also compared for the three types of applicator.
Johnson
R H
RH
Oncology Research Unit, Bristol Royal Infirmary, UK.
Preece
A W
AW
Green
J L
JL
D055590:Electromagnetic Phenomena; D006801:Humans; D006979:Hyperthermia, Induced / Q000295:instrumentation*; D008961:Models, Structural; D009132:Muscles