微波暴露下儿童与成人电磁能量吸收比较研究

COMPARISON OF MICROWAVE ENERGY ABSORPTION IN CHILDREN AND ADULTS

通过仿真人体模型和分层模型分析成人与儿童对电磁能量吸收的差别。用时域有限差分法计算了3GHz微波作用下成人和儿童全身平均比吸收率(SAR)、峰值SAR和各层组织平均SAR。结果显示儿童的全身平均SAR高于成人,但电磁波在成人体内能量沉积的梯度高于儿童;电特性参数升高使浅表组织SAR增高,深层组织SAR降低。

In this paper, the energy absorption in anatomically realistic human models and simplified layer model are analyzed to study the possible difference between adults and children. The Finite-difference time-domain （FDTD） was used for calculating SAR for all models at 3 GHz. Whole-body averaged SAR, layer average SAR and maximum SAR were calculated. Results showed that the Whole-body averaged SAR all trended upwards with the decrease of the size, but the microwave energy deposit gradient was higher in aduhs than in children. With the increase in the dielectric values, the average SAR of the superficial tissues increased, while the average SAR of the deep tissues decre ased.