Effect of measurement noise and electrode density on the spatial resolution of cortical potential distribution with different resistivity values for the skull
Effect of measurement noise and electrode density on the spatial resolution of cortical potential distribution with different resistivity values for the skull
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DOI：
10.1109/tbme.2006.873744
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发表时间：
2006-09-01
影响因子：
4.6
通讯作者：
Malmivuo, Jaakko A.
中科院分区：
文献类型：
--
作者：
Ryynanen, Outi R. M.;Hyttinen, Jari A. K.;Malmivuo, Jaakko A.
本理论研究的目的是检验的空间分辨率的脑电图（EEG）的准确性的逆皮层脑电解决方案的手段。研究了头皮、颅骨和大脑在不同电阻率比下测量噪声量和电极数量对空间分辨率的影响。结果表明，如果颅骨的相对电阻率比以前认为的要低，则不同电极系统的空间分辨率对测量噪声不太敏感。此外，在实际噪声水平下，高分辨率EEG也有更大的优势。
The purpose of the present theoretical study was to examine the spatial resolution of electroencephalography (EEG) by means of the accuracy of the inverse cortical EEG solution. The study focused on effect of the amount of measurement noise and the number of electrodes on the spatial resolution with different resistivity ratios for the scalp, skull and brain. The results show that if the relative skull resistivity is lower than earlier believed, the spatial resolution of different electrode systems is less sensitive to the measurement noise. Furthermore, there is then also greater advantage to be obtained with high-resolution EEG at realistic noise levels.