Induction Thermocoagulation of the Brain-Quantitation of Absorbed Power

Power deposition at the implant and elsewhere inside a head model during inductive thermocoagulation procedures has been studied. A quasistatic approximation is employed to estimate the absorbed power. The model consists of a small solid metallic cylinder implanted inside a homogeneous brain sphere. Results indicate that absorption by the brain is a strong function of location. The implant power absorption is at least two orders of magnitude greater than the rest of the head. The predicted magnetic field squared dependence of the implant power deposition agrees well with reported experimental observations.