脉冲电磁波对球形大脑作用的理论计算

建立了脑球体模型，赋于脑壳与内部组织不同的电参数，应用时域有限差分法（ＦＤＴＤ）计算了在脉冲电磁波辐射下脑内各点电场的瞬时波形及相应的比吸收率ＳＡＲ。计算结果表明，脉冲电磁波对大脑的瞬态作用时间比脉冲宽度要长，且各点波形不尽相同，但在脑中心有最大的ＳＡＲ，对此讨论了其安全性

THEORETICAL CALCULATION OF THE ACTION OF ELECTROMAGNETICPULSE TO A SPHERICAL BRAIN

A model of spherical brain has been constructed, which consists of skull and interior tissue with different constructive parameters. Under the radiation of electromagnetic pulse, the local electric field and SAR in brain has been calculated by the method of finite difference time domain(FDTD). The paper points out that the action period of electromagnetic pulse to a brain is longer than the width of the pulse, the local electrical fields in a brain are different and the SAR at the center of brain has a maximum. The safety for this has been discussed.