Realistic numerical models of human subjects and of the surrounding environment represent the basic points of radiofrequency (F) electromagnetic dosimetry. This involves differentiating the human models in men and women possibly with different body shapes and postures. Objectives of this work are, firstly, to propose a female Dielectric Anatomical Model (fDAM); secondly, to compare the power absorption distributions of a male and a female models from 0.1 to 3 DHz. For realizing the fDAM, a Magnetic Resonance Imaging (MR) tomographer to acquire images and a recent technique which avoids the discrete segmentation of body tissues into different types, were used: Simulations were performed with the Finite Difference Time Domain (FDTD) method, by a robust subgridding algorithm, which allows an abrupt mesh refinement by a factor of 5 or more. The results show that the whole-body average SAR (WBA-SAR) of the female model is higher than that of the male counterpart, mainly because of a thicker subcutaneous fat layer
Sviluppo di fantocci numerici per dosimetria elettromagnetica: confronto uomo-donna in onda piana
Pontalti, Rolando;Vaccari, Alessandro;
2004-01-01
Abstract
Realistic numerical models of human subjects and of the surrounding environment represent the basic points of radiofrequency (F) electromagnetic dosimetry. This involves differentiating the human models in men and women possibly with different body shapes and postures. Objectives of this work are, firstly, to propose a female Dielectric Anatomical Model (fDAM); secondly, to compare the power absorption distributions of a male and a female models from 0.1 to 3 DHz. For realizing the fDAM, a Magnetic Resonance Imaging (MR) tomographer to acquire images and a recent technique which avoids the discrete segmentation of body tissues into different types, were used: Simulations were performed with the Finite Difference Time Domain (FDTD) method, by a robust subgridding algorithm, which allows an abrupt mesh refinement by a factor of 5 or more. The results show that the whole-body average SAR (WBA-SAR) of the female model is higher than that of the male counterpart, mainly because of a thicker subcutaneous fat layerI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
