摘要
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势点的有限元模型 ,通过仿真 ,分析了复合电极宽度对敏感场分布的影响 ,并进一步对不同激励模式 ,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 5 7.1%时 ,效果最优 .结论 进行电极优化设计时 ,其场分布的均匀性。
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.
出处
《第四军医大学学报》
北大核心
2001年第1期78-80,共3页
Journal of the Fourth Military Medical University
基金
国家自然科学基金资助项目! (39870 82 7)
