EEG spectral analysis by coherent optical processing

Great Article in optical imaging and data analysis for EEG, Elsevier.

G Winzer^a and J Shamir^{2, a}

^aSiemens AG, Research Laboratories, Munich, W. Germany

Accepted 22 November 1972. 

Available online 5 March 2003.

Abstract

A possible way of describing some aspects of an EEG curve quantitatively is the evaluation of its power spectrum for a sequence of time epochs. To do this electronic devices are used for real time and post-recording approaches. These approaches suffer from low resolution in the spectrum when a limited number of filter channels is used or a small storage capacity computing device is applied. In the post-recording approach coherent optical processing was found to be a very useful tool for resolution spectral analysis of ink traced curves. The technique described is well suited for single and multichannel analysis and was successfully tested on real multichannel EEG ink tracings. The simple provisional laboratory system which was devised to evaluate the power spectrum may be extedeed so as to extract highly compressed information, such as the variation of statistical moments with time