Patent ID: 11944445
Assignee: UNIVERSITE D'AIX MARSEILLE
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. A detector for the automatic detection of elements of interest in electrophysiological signals, wherein the detector comprises a non-transitory software-recording medium on which a software in the form of an extension module is recorded, wherein the software, when executed by a computer, implements a method comprising:
delivering electrophysiological signals;
producing a whitened time-frequency representation of the electrophysiological signals;
setting a threshold;
applying the threshold to the whitened time-frequency representation;
detecting, in the whitened time-frequency representation, local maxima that are higher than or equal to the threshold,
wherein the producing of the whitened time-frequency representation comprises:
(i) applying a continuous wavelet transform,
(ii) separately standardizing real parts and imaginary parts of wavelet coefficients of the continuous wavelet transform, wherein the standardizing comprises calculating a normalization factor for each frequency of the whitened time-frequency representation by providing a bar chart showing the real parts of the wavelet coefficients, and adjusting a noise model over a central portion of the bar chart, and
(iii) after the standardizing, calculating a square modulus of the standardized real parts and imaginary parts of the wavelet coefficients.