医学电阻抗成像系统电极结构优化设计

目的 研究医学电阻抗成像（ＥＩＴ）系统电极结构对敏感场分布的影响。方法 设计一个具有边界强制等热点的有限元模型。通过仿真，分析了复合电极宽度对敏感场分布的影响。并进一步对不同激厉模式，敏感电极的结构尺寸进行了定量的优化设计。结果 当电极覆盖比率为５７.1%时，效果最优。结论 进行电极优化设计时，其场分布的均匀性、敏度与电极覆盖率应综合考虑。

Optimum design of the structure of electrode for clinical EIT system

AIM To study the distribution of sensing field affected by the structure of electrodes. METHODS A finite element model was designed with the condition of coercive equipotential nodes on boundary. RESULTS Distribution of sensitive field affected by the width of compound electrodes was described via simulation, and the optimum design of structure size of the electrode for different strategy was introduced. CONCLUSION When electrode covering ratio is 57.1% , the effect is optimum, suggesting that optimizing design of electrode, compromise is made between the uniformity and sensitivity of field distribution and electrode covering ratio.