Comput Methods Programs Biomed - Biomedical system based on the Discrete Hidden Markov Model using the Rocchio-Genetic approach for the classification of internal carotid artery Doppler signals.

Tópicos

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Resumo

When the maximum likelihood approach (ML) is used during the calculation of the Discrete Hidden Markov Model (DHMM) parameters, DHMM parameters of the each class are only calculated using the training samples (positive training samples) of the same class. The training samples (negative training samples) not belonging to that class are not used in the calculation of DHMM model parameters. With the aim of supplying that deficiency, by involving the training samples of all classes in calculating processes, a Rocchio algorithm based approach is suggested. During the calculation period, in order to determine the most appropriate values of parameters for adjusting the relative effect of the positive and negative training samples, a Genetic algorithm is used as an optimization technique. The purposed method is used to classify the internal carotid artery Doppler signals recorded from 136 patients as well as of 55 healthy people. Our proposed method reached 97.38% classification accuracy with fivefold cross-validation (CV) technique. The classification results showed that the proposed method was effective for the classification of internal carotid artery Doppler signals.

Resumo Limpo

maximum likelihood approach ml use calcul discret hidden markov model dhmm paramet dhmm paramet class calcul use train sampl posit train sampl class train sampl negat train sampl belong class use calcul dhmm model paramet aim suppli defici involv train sampl class calcul process rocchio algorithm base approach suggest calcul period order determin appropri valu paramet adjust relat effect posit negat train sampl genet algorithm use optim techniqu purpos method use classifi intern carotid arteri doppler signal record patient well healthi peopl propos method reach classif accuraci fivefold crossvalid cv techniqu classif result show propos method effect classif intern carotid arteri doppler signal

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