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Robust Time-Frequency Analysis of Newborn EEG Seizure Corrupted by Impulsive Artefacts

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5 Author(s)
James Brotchie ; Perinatal Research Centre, School of Medicine, University of Queensland, Royal Brisbane and Women's Hospital, Brisbane, Australia ; Luke Rankine ; Mostefa Mesbah ; Paul Colditz
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The newborn EEG seizure is a nonstationary signal. The time-varying nature of the newborn EEG seizure can be characterized by time-frequency representations (TFRs) such as quadratic time-frequency distributions. The underlying time-frequency signatures of newborn EEG seizure, however, can be severely masked by short-time and high amplitude (STHA), or impulsive, artefacts. This type of artefact can be modelled as heavy-tailed noise. Robust time-frequency distributions (RTFDs) have been proposed as methods for TFRs which are robust to heavy-tailed noise. In this paper, we investigate the use of RTFDs for representing the underlying time-frequency characteristics of newborn EEG seizure in the presence of STHA artefacts.

Published in:

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

Date of Conference:

22-26 Aug. 2007