利用BRIR提取脑电信号基本节律特征及其虚拟仪器系统

Feature of Electroencephalogram (EEG) Basic Rhythms Detected by Band Relative Intensity Ratio (BRIR) and the Instrument System

研制了一种“虚拟式脑电记录分析仪”,不仅可以实现脑电信号的无纸描记、记录和显示,而且可以对脑电信号进行定量分析,进行脑电特征波形(如癫痫样波、棘波等)提取和时频域特征分析.从临床应用的角度出发,该仪器引入了频带相对强度比(BRIR)的概念,利用时频分析方法,可以获得某一时刻各个基本节律的相对强度。

A virtual electroencephalogram (EEG) recording and analysis instrument was introduced which can not only realize no paper tracing, record and play, but also provide quantitative EEG analysis. All kinds of characteristic waveforms in EEG signals (e. g. epileptic wave and spikes wave etc. ) can be detected and analyzed in the time-frequency domain. From the view of clinical application, the concept of band relative intensity ratio (BRIR) was introduced in the course of studying for the instrument and by time-frequency analysis methods, the relative intensity of all basic rhythms at some time can be obtained, which provides a better assistant analysis method.