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Accurate Multiscale Permutation Entropy Analysis of Brain Rhythm to Detect Epileptic Seizure

  • Journal of Knowledge Information Technology and Systems
  • Abbr : JKITS
  • 2017, 12(1), pp.199-208
  • DOI : 10.34163/jkits.2017.12.1.018
  • Publisher : Korea Knowledge Information Technology Society
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Published : February 28, 2017

Choi， Young-Seok 1,  Jo, Myung Suk 2,  Kwangmin Hyun 2

1광운대학교
2강릉원주대학교

Accredited

ABSTRACT

Electroencephalogram(EEG) has been a standard tool to monitor the status of the brain. For quantification of EEG, permutation entropy has been of interest due to simplicity and robustness to noise. A multiscale extension of PE, called multiscale PE(MPE), has been promising in fully describing the dynamical characteristics of EEG over multiple temporal scales. However, an imprecise estimation of MPE at large scales limits its application for analyzing of short EEG. Here, a new multiscale PE measure which aims at estimating entropy accurately is presented. By computing PE of all possible coarse-grained time series and averaging the values of PE at each scale, the resultant composite MPE (CMPE) yields improved accuracy in estimation of entropy. Thus, the CMPE measure accomplishes consistent quantification of entropy regardless of the length of data. This advantage of CMPE renders its capability for analyzing EEG signals. Through simulations with two synthetic noises, CMPE has proved its capability over MPE in terms of accuracy. Experimental results using normal, inter-ictal and ictal EEG recordings have shown that the CMPE measure has leaded an improved discrimination capability for three different neurological states (normal, inter-ictal, and ictal states) than the conventional PE family.

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This paper was written with support from the National Research Foundation of Korea.
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