METHOD FOR DETECTING FOCAL EPILEPTIFORM DISCHARGES IN A PROLONGED EEG RECORDING

摘要

The invention relates to medicine and computing. Claimed is a computer-implemented method for automatically detecting focal epileptiform discharges in a prolonged EEG recording, comprising a preparatory step that involves: preprocessing at least one EEG signal on a computer to obtain input data, wherein at least one signal segment having a length of 1 second is isolated in said at least one EEG signal; marking the at least one segment isolated in the preceding step in accordance with an existing expert markup taken from a database; training a neural network by simultaneously feeding to the input thereof at least one pair of 1 second EEG signal segments that pertains to symmetrical channels, and a label corresponding to the first of the two symmetrical channels; carrying out cross-validation to assess classification quality; and selecting a probability cutoff threshold for predicted focal discharges. The claimed method further comprises a working step that involves: preprocessing at least one EEG signal on a computer, wherein at least one signal segment having a length of 1 second is isolated in said at least one EEG signal; launching the neural network trained in the preceding step, and feeding to the input thereof at least one pair of 1 second EEG signal segments that pertains to symmetrical channels; obtaining at the output an assessment of the probability that the first of the two symmetrical signal segments belongs to the class of epileptiform signals; applying a cutoff to the obtained probabilities in accordance with the predetermined threshold, and generating a list of predicted focal epileptiform discharges; carrying out a localization search for the source of the discharges by automatically applying the predicted focal discharges to a map taking into account the standard placement of electrodes, and performing interpolation to determine the distribution of focal epileptiform discharges. The technical result consists in reducing the time taken to detect focal epileptiform discharges.