OBJECTIVE To assay EEG signal quality recorded with tripolar concentric ring electrodes (TCREs) compared to regular EEG electrodes. METHODS EEG segments were recorded simultaneously by TCREs and regular electrodes, low-pass filtered at 35 Hz (REG35) and 70 Hz (REG70). Clips were rated blindly by nine electroencephalographers for presence or absence of key EEG features, relative to the "gold-standard" of the clinical report. RESULTS TCRE showed less EMG artifact (F = 15.4, p < 0.0001). Overall quality rankings were not significantly different. Focal slowing was better detected by TCRE and spikes were better detected by regular electrodes. Seizures (n = 85) were detected by TCRE in 64 cases (75.3%), by REG70 in 75 (88.2%) and REG35 in 69 (81.2%) electrodes. TCRE detected 9 (10.6%) seizures not detected by one of the other 2 methods. In contrast, 14 seizures (16.5%) were not detected by TCRE, but were by REG35 electrodes. Each electrode detected interictal spikes when the other did not. CONCLUSIONS TCRE produced similar overall quality and confidence ratings versus regular electrodes, but less muscle artifact. TCRE recordings detected seizures in 7% of instances where regular electrodes did not. SIGNIFICANCE The combination of the two types increased detection of epileptiform events compared to either alone.

中文翻译：

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三极同心脑电图电极降低噪音

目的 与常规 EEG 电极相比，测定使用三极同心环电极 (TCRE) 记录的 EEG 信号质量。方法 由 TCRE 和常规电极同时记录 EEG 段，在 35 Hz (REG35) 和 70 Hz (REG70) 下进行低通滤波。相对于临床报告的“黄金标准”，9 位脑电图医师对剪辑的关键 EEG 特征的存在与否进行了盲评。结果 TCRE 显示较少的 EMG 伪影（F = 15.4，p < 0.0001）。总体质量排名没有显着差异。TCRE 可以更好地检测到焦点减速，而常规电极可以更好地检测到尖峰。TCRE 在 64 例 (75.3%) 中检测到癫痫发作 (n = 85)，在 75 个 (88.2%) 中通过 REG70 在 69 个 (81.2%) 电极中检测到癫痫发作 (n = 85)。TCRE 检测到其他 2 种方法之一未检测到的 9 次（10.6%）癫痫发作。相比之下，14 次癫痫发作 (16.5%) 未被 TCRE 检测到，但被 REG35 电极检测到。每个电极都检测到发作间期尖峰，而另一个则没有。结论 与常规电极相比，TCRE 产生了相似的整体质量和置信度评级，但肌肉伪影较少。TCRE 记录在 7% 的情况下检测到癫痫发作，而常规电极则没有。意义 与单独使用两种类型相比，两种类型的组合增加了癫痫样事件的检测。