Genetic programming of conventional features to detect seizure precursors

  • Authors:

  • Otis Smart;Hiram Firpi;George Vachtsevanos

  • Affiliations:

  • Intelligent Control Systems Laboratory, Biomedical Engineering Research Group, Georgia Institute of Technology, 813 Ferst Drive, N.W., Atlanta, GA 30332, USA;Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, 714 North Senate Avenue, Suite 250, Indianapolis, IN 46202-5122, USA;School of Electrical and Computer Engineering, Georgia Institute of Technology, Van Leer Building, 777 Atlantic Drive, Atlanta, GA 30332, USA

  • Venue:
  • Engineering Applications of Artificial Intelligence
  • Year:
  • 2007

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Abstract

This paper presents an application of genetic programming (GP) to optimally select and fuse conventional features (C-features) for the detection of epileptic waveforms within intracranial electroencephalogram (IEEG) recordings that precede seizures, known as seizure precursors. Evidence suggests that seizure precursors may localize regions important to seizure generation on the IEEG and epilepsy treatment. However, current methods to detect epileptic precursors lack a sound approach to automatically select and combine C-features that best distinguish epileptic events from background, relying on visual review predominantly. This work suggests GP as an optimal alternative to create a single feature after evaluating the performance of a binary detector that uses: (1) genetically programmed features; (2) features selected via GP; (3) forward sequentially selected features; and (4) visually selected features. Results demonstrate that a detector with a genetically programmed feature outperforms the other three approaches, achieving over 78.5% positive predictive value, 83.5% sensitivity, and 93% specificity at the 95% level of confidence.