摘要
目的:针对一种新型的医用Ag/AgCl粉末电极和传统的医用Ag/AgCl镀层电极,比较两者在脑部电阻抗断层成像(Electrical Impedance Tomography,EIT)测量中的性能差异。方法:基于自行开发的EIT系统,分别利用Ag/AgCl粉末电极和镀层电极,分别对物理模型和人体对象进行脑部电阻抗断层成像测量,并且通过提出的两个指标(高频信噪比和低频信噪比)及接触阻抗来评价电极系统的特性。结果:相对于Ag/AgCl镀层电极,Ag/AgCl粉末电极具有更好的抗噪性和稳定性。结论:Ag/AgCl粉末电极能更有效地满足脑部EIT监护的要求。
Objective To compare the performance of novel Ag/AgCl pulverized electrodes with conventional Ag/AgCl coating electrodes in cerebral application of Electrical Impedance Tomography （EIT）. Methods Based on the EIT system developed by our group, raw data were measured on a phantom and an adult volunteer, with Ag/AgCl coating electrodes and pulverized electrodes, respectively. The performances of electrode systems were evaluated in contact impedance and two other figures （the high-frequency SNR, HFSNR; the low-frequency SNR, LFSNR）. Results Ag/AgCl pulverized electrode plays a better performance in resisting noise and keeping stabilization. Conclusion Ag/AgCl pulverized electrode develops the needs of imaging and monitoring human brains in EIT more availably.
出处
《医疗卫生装备》
CAS
2008年第9期7-11,共5页
Chinese Medical Equipment Journal
基金
国家自然科学基金重点项目(50337020)
国家重点支撑项目(2006BAI03A14)
