J Med Syst - Analysis of spike waves in epilepsy using Hilbert-Huang transform.

Tópicos

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Resumo

In this paper, we used the Hilbert-Huang transform (HHT) analysis method to examine the time-frequency characteristics of spike waves for detecting epilepsy symptoms. We obtained a sample of spike waves and nonspike waves for HHT decomposition by using numerous intrinsic mode functions (IMFs) of the Hilbert transform (HT) to determine the instantaneous, marginal, and Hilbert energy spectra. The Pearson correlation coefficients of the IMFs, and energy-IMF distributions for the electroencephalogram (EEG) signal without spike waves, Spike I, Spike II and Spike III sample waves were determined. The analysis results showed that the ratios of the referred wave and Spike III wave to the referred total energy for IMF1, IMF2, and the residual function exceeded 10%. Furthermore, the energy ratios for IMF1, IMF2, IMF3 and the residual function of Spike I, Spike II to their total energy exceeded 10%. The Pearson correlation coefficients of the IMF3 of the EEG signal without spike waves and Spike I wave, EEG signal without spike waves and Spike II wave, EEG signal without spike waves and Spike III wave, Spike I and II waves, Spike I and III waves, and Spike II and III waves were 0.002, 0.06, 0.01, 0.17, 0.03, and 0.3, respectively. The energy ratios of IMF3 in the d band to its referred total energy for the EEG signal without spike waves, and of the Spike I, II, and III waves were 4.72, 6.75, 5.41, and 5.55%, respectively. The weighted average frequency of the IMF1, IMF2, and IMF3 of the EEG signal without spike waves was lower than that of the IMF1, IMF2, and IMF3 of the spike waves, respectively. The weighted average magnitude of the IMF3, IMF4, and IMF5 of the EEG signal without spike waves was lower than that of the IMF1, IMF2, and IMF3 of spike waves, respectively.

Resumo Limpo

paper use hilberthuang transform hht analysi method examin timefrequ characterist spike wave detect epilepsi symptom obtain sampl spike wave nonspik wave hht decomposit use numer intrins mode function imf hilbert transform ht determin instantan margin hilbert energi spectra pearson correl coeffici imf energyimf distribut electroencephalogram eeg signal without spike wave spike spike ii spike iii sampl wave determin analysi result show ratio refer wave spike iii wave refer total energi imf imf residu function exceed furthermor energi ratio imf imf imf residu function spike spike ii total energi exceed pearson correl coeffici imf eeg signal without spike wave spike wave eeg signal without spike wave spike ii wave eeg signal without spike wave spike iii wave spike ii wave spike iii wave spike ii iii wave respect energi ratio imf d band refer total energi eeg signal without spike wave spike ii iii wave respect weight averag frequenc imf imf imf eeg signal without spike wave lower imf imf imf spike wave respect weight averag magnitud imf imf imf eeg signal without spike wave lower imf imf imf spike wave respect

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