Correlation between peak spatial-average SAR and maximum temperature elevation in layered cubical model in the frequency range above 3 GHz

Abstract

The present study investigates the correlation between maximum temperature elevation and peak mass-averaged specific absorption rates (SARs) in layered one-dimensional model and layered cubical model. The resolution of the model is 0.5 mm or less in order to calculate the correlation in frequencies up to 10 GHz. Our computational investigation in the one-dimensional model showed that the variability due to the thickness is several dozen percents or more, which is dependent on the frequency. In the three-dimensional homogeneous model, SARs averaged over 10 g provides reasonable correlation with maximum temperature elevation for frequencies up to 6 GHz. For the layered cubical model, the SAR averaged over 1g provides better frequency characteristics of the correlation with the maximum temperature elevation, while the variability of the ratio for different tissue thickness remains future work.