EEG localization accuracy improvements using realistically shaped head models
EEG localization accuracy improvements using realistically shaped head models
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DOI：
10.1109/10.486287
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发表时间：
1996-03-01
影响因子：
4.6
通讯作者：
Cuffin, BN
中科院分区：
文献类型：
--
作者：
Cuffin, BN
在使用在头皮上测量的脑电图（EEG）来估计大脑中的电源的位置时，必须使用头部的模型。在某种程度上，这些估计的准确性取决于模型对实际头部的准确程度。在迄今为止进行的大多数工作中，使用了头部的球形模型。本文介绍的结果，其中的源位置的估计是在现实形状的头部模型。还提出了用于从CT、MRI、X射线和/或物理测量准确且方便地开发逼真形状的头部模型的技术。逼真的形状的头部模型，开发了三个主题的电源植入在已知的位置在大脑中。定位精度被发现是显着更好的现实形状的头部模型比球形模型，如果EEG的具有良好的信号-噪声比使用。
A model of the head must be used in making estimates of the locations of electrical sources in the brain using electroencephalograms (EEG's) measured on the scalp. In part, the accuracy of these estimates is dependent on how accurately the model represents the actual head. In most work performed to date, spherical models of the head have been used. This paper presents results in which the estimates of source location are made in realistically shaped head models. Techniques for accurately and conveniently developing realistically shaped head models from CT's, MRI's, Xrays, and/or physical measurements are also presented. Realistically shaped head models are developed for three subjects with electrical sources implanted at known locations in the brain. Localization accuracy is found to be significantly better in the realistically shaped head models than in spherical models if EEG's with good signal-to-noise ratio are used.