SAR analysis of resonant cavity applicator using dielectric bolus with anatomical human model by finite element method

Abstract

In this study, we propose a new heating method using a resonant cavity applicator to control the heated area using a dielectric bolus. The dielectric bolus is filled with a dielectric material such as water and is attached to a human head inside the cavity. In this paper, first, the proposed heating method using the dielectric bolus was described. Second, a 3-D anatomical human head model, which was constructed from 2-D MRI and X-ray CT images, was presented. Finally, from the results of specific absorption rate (SAR) distributions using 3-D FEM, it was shown that the heated area inside a human brain could be controlled by changing the electromagnetic field distribution. From these results, it was found that the proposed method for controlling the heated area was useful for effective hyperthermia treatments.