arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1702.02655cs.LG
收藏

对称正定矩阵流形上的EEG多实例框架表示及其脑电辅助诊断

EEG Representation Using Multi-instance Framework on The Manifold of Symmetric Positive Definite Matrices for EEG-based Computer Aided Diagnosis

Amirkabir University of Technology(阿米尔卡比尔理工大学);Atieh Clinical Neuroscience Center(阿提耶临床神经科学中心)

Khadijeh Sadatnejad, Saeed S. Ghidary, Reza Rostami, Reza Kazemi

摘要:

基于脑电(EEG)的计算机辅助诊断系统的通用性和鲁棒性是实际临床实践中的关键要求。为了实现这些目标,我们提出了一种新的EEG表示,通过应用多实例(MI)框架来考虑EEG信号的非平稳性,提供了一个更真实的大脑功能视图。通过将脑电信号描述为一组相关和不相关的概念,考虑了脑电信号的非平稳特性。这些概念由使用空间协方差矩阵的EEG信号的同质段的鲁棒表示提供。由于协方差矩阵的空间的非线性几何,我们确定的基础上自适应分割的信号在黎曼框架的均匀段的边界。每个主题被描述为一个袋的协方差矩阵的同质段和袋级的判别信息用于分类。为了评估所提出的方法的性能,我们研究它在注意缺陷多动/双相情感障碍检测和抑郁症/正常诊断应用。实验结果证实了该方法的优越性,这是由于协方差描述符的鲁棒性,黎曼几何的有效性,并考虑大脑固有的非平稳性质的好处。

英文摘要:

The generalization and robustness of an electroencephalogram (EEG)-based computer aided diagnostic system are crucial requirements in actual clinical practice. To reach these goals, we propose a new EEG representation that provides a more realistic view of brain functionality by applying multi-instance (MI) framework to consider the non-stationarity of the EEG signal. The non-stationary characteristic of EEG is considered by describing the signal as a bag of relevant and irrelevant concepts. The concepts are provided by a robust representation of homogenous segments of EEG signal using spatial covariance matrices. Due to the nonlinear geometry of the space of covariance matrices, we determine the boundaries of the homogeneous segments based on adaptive segmentation of the signal in a Riemannian framework. Each subject is described as a bag of covariance matrices of homogenous segments and the bag-level discriminative information is used for classification. To evaluate the performance of the proposed approach, we examine it in attention deficit hyperactivity/bipolar mood disorder detection and depression/normal diagnosis applications. Experimental results confirm the superiority of the proposed approach, which is gained due to the robustness of covariance descriptor, the effectiveness of Riemannian geometry, and the benefits of considering the inherent non-stationary nature of the brain.

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。

↑