TEMPERATURE DEPENDING SAR DISTRIBUTION IN HUMAN-BODY DURING HYPERTHERMIA TREATMENT

The simulation of a specific absorption rate (SAR) with a temperature distribution becomes more important in the treatment planning for micr owave hyperthermia. The simulation technique can also be used to estim ate SAR distribution inside human body under hazardous electromagnetic (EM) field circumstances. In the simulation, to use exact permittivit y of biological tissues becomes very important to obtain accurate SAR distribution. The permittivity of the medium is very sensitive to the temperature. Therefore, it is considered that the SAR distribution is also very sensitive to the tissue temperature. In this paper, SAR dist ribution is calculated using FD-TD method considering tissue temperatu re under the electromagnetic (EM) field irradiation. Simulations of te mperature distribution are also performed using heat transfer equation . In addition, temperature depending blood flow is taking into account to obtain temperature depending SAR distribution. The results can be used to estimate temperature depending heat generation which can be ap plied such as microwave hyperthermia treatment.