HRV Feature Selection for Neonatal Seizure Detection: A Wrapper Approach

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HRV Feature Selection for Neonatal Seizure Detection: A Wrapper Approach

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Title: HRV Feature Selection for Neonatal Seizure Detection: A Wrapper Approach
Author: Malarvili, M.B.; Mesbah, M; Boashash, B
Abstract: This work addresses the feature selection problem using a wrapper approach to select a feature subset to distinguish between the classes of newborn heart rate variability (HRV) corresponding to seizure and non-seizure. The method utilizes a filter as a pre-step to remove the irrelevant and redundant features from the original set of features to provide a starting feature subset for the wrapper. This reduces the computation load and the severity of the search operations involved in a wrapper approach. The goodness of the feature subset selected is compared over 3 different classifiers, namely linear classifier, quadratic classifier and k-Nearest Neighbour (k-NN) statistical classifiers in a leave-one-out (LOO) cross validation. It was found that the 1-NN outperformed the other classifiers resulting in significant reductions in feature dimensionality and achieving 85.7% sensitivity and 84.6% specificity.
Description: This paper presents a number of newborn HRV features from time domain and TF domain that are used to classify the HRV epochs as either seizure related or non-seizure related, using a wrapper-based feature selection process and the MBD. (Additional details can be found in the comprehensive book on Time-Frequency Signal Analysis and Processing (see http://www.elsevier.com/locate/isbn/0080443354). In addition, the most recent upgrade of the original software package that calculates Time-Frequency Distributions and Instantaneous Frequency estimators can be downloaded from the web site: www.time-frequency.net. This was the first software developed in the field, and it was first released publicly in 1987 at the 1st ISSPA conference held in Brisbane, Australia, and then continuously updated).
URI: http://hdl.handle.net/10576/10801
Date: 2007-11

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