Abstract
Design of an on-line system utilizing a minicomputer and a specific dedicated hardware for 2T brain tissue impedance is provided. The prototype system, which can operate from 2 Hz to 10 kHz, covers most of the frequency range of interest in the encephalographic research. Driving the brain tissue with constant current and sampling the response current and voltage, the coefficients for a Fourier series expansion can easily be obtained. Real (resistance) and imaginary (capacitance) impedance components at each chosen frequency are printed on a Teletype printer.
摘要
本文介绍了一种利用小型计算机和特定专用硬件设计的用于测量2T脑组织阻抗的在线系统。该原型系统的工作频率范围为2Hz至10kHz，涵盖了脑电图研究中大部分感兴趣的频率范围。通过向脑组织施加恒定电流并对响应电流和电压进行采样，可以轻松获得傅里叶级数展开的系数。每个选定频率下的实部（电阻）和虚部（电容）阻抗分量会打印在电传打字机上。
Zotero 插件