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Localization of Epileptogenic Foci and Visualization of Propagating Process in the Seizure Discharges Using Crosscorrelation Analysis Yuko Matsumoto-Mizuno 1 , Kozo Okazaki 2 , Amami Kato 3 , Toshiki Yoshimine 3 , Yoshinobu Sato 1 , Shinichi Tamura 1 , Kazumi Yamashita 4 1Division of Functional Diagnostic Imaging, Osaka University Medical School 2Department of Electrical and Electronic Engineering, Fukui University 3Department of Neurosurgery, Osaka University Medical School 4Department of Electronics, Faculty of Engineering, Kansai University Keyword: electrocorticogram , epilepsy , visualization , propagation , crosscorrelation analysis pp.59-64
Published Date 1997/1/1
DOI https://doi.org/10.11477/mf.1406902079
  • Abstract
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Electrocorticogram (ECoG) of intractable focal epilepsy was analyzed using AR model, wavelet analysis and crosscorrelation analysis. The sequen-tial 3-dimensional visualization technique of phase shift maps was developed to localize the epileptic foci and to study their propagation process. The crosscorrelation of the epileptic discharges was calculated between the electrodes in every unit of time, to get the phase shift. More than two epilepto-genic foci were localizad and two kinds of propagat-ing process were shown.


Copyright © 1997, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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