脉冲激励源_____电阻抗；脉冲激励源；模拟开关

PKB/Akt 脉冲电流激励模式下阻抗测量的原理与实现

http://www.100md.com 《第四军医大学学报》 2003年第8期

脉冲激励源,,电阻抗；脉冲激励源；模拟开关,PKB,Akt脉冲电流激励模式下阻抗测量的原理与实现,0引言,1原理,2设计与实现,3结果,4讨论,【参考文献】

     (第四军医大学生物医学工程系医学电子工程教研室，陕西西安 710033)

    Mechanism and implementation of impedance measurement excited by current pulses

    LI Jiang, DONG XiuZhen, QIN MingXin, YOU FuSheng, SHI XueTao, YANG Bin, LI ShiJun

    Department of Medical Electronic Engineering, Faculty of Biomedical Engineering, Fourth Military Medical University, Xian 710033, China

    【Abstract】AIM： To study the mechanism and implementation of currentpulseexciting impedance measurement of biotissues. METHODS： An impedance measurement system was designed and implemented by timer, analog switch, sampleandhold amplifier and A/D board. RESULTS: The blood pulsation of head was measured successfully. CONCLUSION: Compared with the continuous sine wave exciting mode used in the measurement of impedance, currentpulseexciting mode can offer much lower current load to biotissues, higher signal to noise ratio and better penetrability. ......

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