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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Time-trend analysis of the center frequency of the intrinsic mode function from the Hilbert–Huang transform of electroencephalography during general anesthesia: a retrospective observational study

Fig. 3

HHT analyzer. This figure shows the graphical user interface of the HHT analyzer. The upper half of the window shows the original EEG signal and its IMFs. The lower half windows show the power spectrums analyzed using a fast Fourier transform (left) and a Hilbert–Huang transform (middle). In addition, the Hilbert spectrogram is shown in the lower right

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BMC Anesthesiology

ISSN: 1471-2253

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