数字化动态脑电图记录方法的研究

RECORDING METHODS FOR A DIGITIZED AMBULATORY EEG SYSTEM

动态脑电图记录的数字化，能使记录的导联更多，时间更长，信号的失真率小，并可在记录的同时进行信号分析。其难点在于大量脑电数据如何在携带的装置内安全地储存。本工作采用改进的四选一脑电数据压缩算法，小型便携式硬盘作为存储媒体。

igitized ambulatory EEG system can record EEG signals with more channels, longer period of time and much higher accuracy than analogous system. Even more, it can analize EEG signals while recording. In designing a 16 channels digitized ambulatory EEG system, the main difficulty is how to store the extremly large amount of EEG data in a portable device. We used ‘select one from four’ algorithm for EEG data compression and selected portable hard disks as storage media. Three levels data management and effective packaging of data were adopted for the system. Our results showed that to built a 16 channels 24 hours digitized ambulatory EEG system was feasible.