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arXiv 2604.01595cs.LG

优化EEG图结构用于癫痫检测:信息瓶颈与自监督学习方法

Optimizing EEG Graph Structure for Seizure Detection: An Information Bottleneck and Self-Supervised Learning Approach

Florida State University(佛罗里达州立大学);The University of Osaka(大阪大学)

Lincan Li, Rikuto Kotoge, Xihao Piao, Zheng Chen, Yushun Dong

AI总结:

本文提出IRENE方法,通过信息瓶颈原理和自监督学习优化EEG图结构,解决癫痫检测中的噪声、稀疏标签和患者差异问题,提升模型性能。

摘要:

从EEG信号中检测癫痫极具挑战性,由于复杂的时空动态和极端的患者间差异。为建模这些特性,最近的方法通过统计相关性、预定义相似性度量或隐式学习构建动态图,但很少考虑EEG的噪声特性。因此,这些图通常包含冗余或无关连接,即使使用最先进的架构也会损害模型性能。本文提出了一种新的视角:通过信息瓶颈(IB)原理联合学习去噪的动态图结构和信息丰富的时空表示。与以往方法不同,我们的图构造器明确考虑了EEG数据的噪声特性,产生紧凑且可靠的连接模式,更好地支持下游癫痫检测。为进一步增强表示学习,我们采用自监督图掩码自编码器,基于动态图上下文重建掩码的EEG信号,促进结构感知和紧凑的表示,符合IB原则。综合来看,我们引入了信息瓶颈引导的EEG癫痫检测(IRENE),通过自监督学习显式学习动态图结构和可解释的时空EEG表示。IRENE解决三个核心挑战:(i)识别最有信息的节点和边;(ii)解释脑网络中的癫痫传播;(iii)增强对标签稀少和患者差异的鲁棒性。在基准EEG数据集上的广泛实验表明,我们的方法在癫痫检测上优于最先进的基线,并提供了临床有意义的癫痫动态见解。源代码可在https://github.com/LabRAI/IRENE获得。

英文摘要:

Seizure detection from EEG signals is highly challenging due to complex spatiotemporal dynamics and extreme inter-patient variability. To model them, recent methods construct dynamic graphs via statistical correlations, predefined similarity measures, or implicit learning, yet rarely account for EEG's noisy nature. Consequently, these graphs usually contain redundant or task-irrelevant connections, undermining model performance even with state-of-the-art architectures. In this paper, we present a new perspective for EEG seizure detection: jointly learning denoised dynamic graph structures and informative spatial-temporal representations guided by the Information Bottleneck (IB). Unlike prior approaches, our graph constructor explicitly accounts for the noisy characteristics of EEG data, producing compact and reliable connectivity patterns that better support downstream seizure detection. To further enhance representation learning, we employ a self-supervised Graph Masked AutoEncoder that reconstructs masked EEG signals based on dynamic graph context, promoting structure-aware and compact representations aligned with the IB principle. Bringing things together, we introduce Information Bottleneck-guided EEG SeizuRE DetectioN via SElf-Supervised Learning (IRENE), which explicitly learns dynamic graph structures and interpretable spatial-temporal EEG representations. IRENE addresses three core challenges: (i) Identifying the most informative nodes and edges; (ii) Explaining seizure propagation in the brain network; and (iii) Enhancing robustness against label scarcity and inter-patient variability. Extensive experiments on benchmark EEG datasets demonstrate that our method outperforms state-of-the-art baselines in seizure detection and provides clinically meaningful insights into seizure dynamics. The source code is available at https://github.com/LabRAI/IRENE.

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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