Pre-whitening and Null Projection as an Artifact Suppression Method for Electrocorticography Stimulation in Bi-Directional Brain Computer Interfaces
Pre-whitening and Null Projection as an Artifact Suppression Method for Electrocorticography Stimulation in Bi-Directional Brain Computer Interfaces
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预白化和零投影作为双向脑机接口中皮质电图刺激的伪影抑制方法
DOI：
10.1109/embc44109.2020.9175760
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Nenadic, Zoran
中科院分区：
文献类型：
--
作者：
Lim, Jeffrey;Wang, Po T.;Shaw, Susan J.;Armacost, Michelle;Gong, Hui;Liu, Charles Y.;Do, An H.;Heydari, Payam;Nenadic, Zoran
基于皮层电图（ECoG）的双向（BD）脑机接口（BCI）是一项即将推出的技术，有望帮助恢复运动和感觉缺陷患者的功能。这种范例的一个主要问题是，引起人工感觉所必需的皮层刺激产生了强烈的电伪影，其可以通过饱和记录放大器或模糊有用的神经信号来破坏BCI操作。即使使用最先进的硬件伪影抑制方法，仍然需要鲁棒的信号处理技术来抑制存在于数字后端的残留伪影。在此，我们使用临床神经刺激程序期间记录的ECoG数据证明了预白化和零投影伪影抑制方法的有效性。我们的方法实现了21.49 dB的最大伪影抑制，并显著增加了频域中无伪影频率的数量。这种性能超过了更传统的独立分量分析方法，同时保持了降低的复杂性和提高的计算效率。
Electrocorticography (ECoG)-based bi-directional (BD) brain-computer interfaces (BCIs) are a forthcoming technology promising to help restore function to those with motor and sensory deficits. A major problem with this paradigm is that the cortical stimulation necessary to elicit artificial sensation creates strong electrical artifacts that can disrupt BCI operation by saturating recording amplifiers or obscuring useful neural signal. Even with state-of-the-art hardware artifact suppression methods, robust signal processing techniques are still required to suppress residual artifacts that are present at the digital back-end. Herein we demonstrate the effectiveness of a pre-whitening and null projection artifact suppression method using ECoG data recorded during a clinical neurostimulation procedure. Our method achieved a maximum artifact suppression of 21.49 dB and significantly increased the number of artifact-free frequencies in the frequency domain. This performance surpasses that of a more traditional independent component analysis methodology, while retaining a reduced complexity and increased computational efficiency.
基于子空间的皮质刺激伪影抑制
DOI：
10.1109/embc.2018.8512809
发表时间：
2018
期刊：
2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
影响因子：
--
作者：
Po T. Wang;Colin M. McCrimmon;P. Heydari;An H. Do;Z. Nenadic
通讯作者：
Z. Nenadic
动态脑机接口：大脑与动力系统之间双向交互的新范例
DOI：
10.1109/iembs.2011.6091137
发表时间：
2011
期刊：
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Francois D. Szymanski;M. Semprini;F. Mussa;L. Fadiga;S. Panzeri;A. Vato
通讯作者：
A. Vato
影响因子：
4.6
作者：
Shun;A. L. Swindlehurst;Po T. Wang;Z. Nenadic
通讯作者：
Z. Nenadic