Evaluating SAR Distribution on the Human Head during MRI Examination as Function of Frequency

Abstract

The present paper aims to evaluate the specific absorption rate (SAR) distribution in human head during MRI examinations. Numerical calculations of the SAR distribution into the human head during the Magnetic Resonance Imaging (MRI) proceedings were performed in SEMCAD X software based on the Finite Difference Time Domain (FDTD) method. The SAR distribution due to human head exposure to radio frequency radiation during MRI revealed areas with increased values. Based on our work, exposure threshold values could limit the number of investigations using MRI. Thus, research made during the preparation of this paper and the results obtained are very important both for the medical world as well as the legislative involved in the issue.