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arXiv 2202.06284eess.SP
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用于癫痫发作检测的重要低维谱时特征

Significant Low-dimensional Spectral-temporal Features for Seizure Detection

Xucun Yan, Dongping Yang, Zihuai Lin, Branka Vucetic

摘要:

由于癫痫发作的非定型性以及其随机性和非平稳性,脑电信号中癫痫发作的检测是一项具有挑战性的任务。联合频谱-时间特征被认为包含了足够的和强大的特征信息,用于失神发作检测。然而,由此产生的高维特征涉及冗余信息,需要沉重的计算负荷。在这里,我们发现了显着的低维频谱-时间的小波变换系数(MS-WTC)的平均标准差的功能,在此基础上开发了一种新的失神发作检测框架。EEG信号被转换到频谱-时间域,其低维特征被送入卷积神经网络。在广泛使用的基准数据集以及中国301医院的临床数据集上实现了卓越的检测性能。对于前者,七个分类任务进行了评估,准确率从99.8%到100.0%,而对于后者,该方法达到了94.7%的平均准确率,压倒了其他方法与低维的时间和光谱特征。在两个癫痫发作数据集上的实验结果表明,我们提出的MS-WTC方法的可靠性,效率和稳定性,验证了提取的低维谱时特征的意义。

英文摘要:

Seizure onset detection in electroencephalography (EEG) signals is a challenging task due to the non-stereotyped seizure activities as well as their stochastic and non-stationary characteristics in nature. Joint spectral-temporal features are believed to contain sufficient and powerful feature information for absence seizure detection. However, the resulting high-dimensional features involve redundant information and require heavy computational load. Here, we discover significant low-dimensional spectral-temporal features in terms of mean-standard deviation of wavelet transform coefficient (MS-WTC), based on which a novel absence seizure detection framework is developed. The EEG signals are transformed into the spectral-temporal domain, with their low-dimensional features fed into a convolutional neural network. Superior detection performance is achieved on the widely-used benchmark dataset as well as a clinical dataset from the Chinese 301 Hospital. For the former, seven classification tasks were evaluated with the accuracy from 99.8% to 100.0%, while for the latter, the method achieved a mean accuracy of 94.7%, overwhelming other methods with low-dimensional temporal and spectral features. Experimental results on two seizure datasets demonstrate reliability, efficiency and stability of our proposed MS-WTC method, validating the significance of the extracted low-dimensional spectral-temporal features.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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