关键词: 电阻抗断层成像;大脑;仿真

    摘 要:目的 建立大脑的生物电阻抗模型，仿真研究生物电阻抗脑断层成像正向问题. 方法 利用大脑的磁共振成像结果构造模型，采用有限元方法计算正向问题. 结果 电极数和剖分方式对内部信息的提取有影响;电阻率变化的位置、面积和大小对边界电压值影响较大. 结论 为生物电阻抗脑断层成像提供可靠的定量分析数据.

    Simulating study of forward problem of electrical impedance tomography in brain

    QIN Ming-Xin，DONG Xiu-Zhen，HAN Tao，LIU Rui-Gang，TANG Meng-Xing，FU Feng，YOU Fu-Sheng，SHI Xue-Tao

    Department of Medical Electronic Engineering，Fac-ulty of Biomedical Engineering，Fourth Military Medical University，Xi'an710033，China

    Keywords:electrical impedance tomography;brain;simula-tion

    Abstract:AIM To build a brain bioelectrical impedance model and implement Simulating studies of forward problem of electrical impedance tomography in the brain.METHODS Model was built according to the results of magnetic reso-nance imaging in a head and the forward problem was com-puted with the finite element method.RESULTS Electrode number and mesh mode had effects on obtaining internal in-formation and the changes of the boundary voltage produced by location ......