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首页> 外文期刊>Clinical EEG and neuroscience: official journal of the EEG and Clinical Neuroscience Society (ENCS) >Optimal evaluation of digital electroencephalograms.
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Optimal evaluation of digital electroencephalograms.

机译：数字脑电图的最佳评估。

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摘要

Currently available digital EEG equipment provides considerably greater opportunities for clinical data analysis than is generally appreciated especially when appropriate software is used. Data from 7 different laboratories that had been obtained for routine diagnostic evaluations on 7 different EEG instruments and stored on compact disks were investigated. Since the instruments do not filter the data at input, ultra slow activity down to 0.01 Hz is currently being recorded but the attenuation factor is instrument dependent. Nevertheless, relevant clinical information is potentially available in these data and needs to be explored. Several examples in regard to epilepsy are presented. Determination of seizure onset may depend on the frequencies that are examined. The use of appropriate filter settings and viewing windows for the clinical question to be answered is stressed. Differentiation between simple and complex spike wave discharges, as well as spread of spikes, can readily be achieved by expanding the time base to 1 or 2 seconds and placing a cursor on the peak of the negative spike. Latencies in the millisecond range can then become apparent. EEGs co-registered with MEG should be evaluated with the same software in order to allow an adequate assessment of the similarities and differences between electrical and magnetic activity. An example of a comparison of EEG, planar gradiometers and magnetometers for an averaged spike is shown.
机译：与通常所认识到的相比，当前可用的数字EEG设备为临床数据分析提供了更大的机会，尤其是在使用适当的软件时。调查了来自7个不同实验室的数据，这些数据已通过7种不同EEG仪器的常规诊断评估获得并存储在光盘上。由于仪器不对输入数据进行过滤，因此目前正在记录低至0.01 Hz的超慢活动，但衰减系数取决于仪器。但是，相关的临床信息可能会在这些数据中提供，并且需要进行探索。提出了一些有关癫痫的例子。癫痫发作的确定可能取决于所检查的频率。强调使用适当的过滤器设置和查看窗口来回答要解决的临床问题。通过将时基扩展到1或2秒并将光标放在负尖峰的峰值上，可以轻松实现简单尖峰波放电和复杂尖峰波放电之间的区别以及尖峰的扩散。这样，毫秒级的延迟就会变得很明显。与MEG共同注册的EEG应使用相同的软件进行评估，以便能够充分评估电活动和磁活动之间的相似性和差异。示出了针对平均尖峰的EEG，平面梯度计和磁力计的比较示例。

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