Comput Methods Programs Biomed - Automatic quality assessment and peak identification of auditory brainstem responses with fitted parametric peaks.

Tópicos

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Resumo

The recording of the auditory brainstem response (ABR) is used worldwide for hearing screening purposes. In this process, a precise estimation of the most relevant components is essential for an accurate interpretation of these signals. This evaluation is usually carried out subjectively by an audiologist. However, the use of automatic methods for this purpose is being encouraged nowadays in order to reduce human evaluation biases and ensure uniformity among test conditions, patients, and screening personnel. This article describes a new method that performs automatic quality assessment and identification of the peaks, the fitted parametric peaks (FPP). This method is based on the use of synthesized peaks that are adjusted to the ABR response. The FPP is validated, on one hand, by an analysis of amplitudes and latencies measured manually by an audiologist and automatically by the FPP method in ABR signals recorded at different stimulation rates; and on the other hand, contrasting the performance of the FPP method with the automatic evaluation techniques based on the correlation coefficient, FSP, and cross correlation with a predefined template waveform by comparing the automatic evaluations of the quality of these methods with subjective evaluations provided by five experienced evaluators on a set of ABR signals of different quality. The results of this study suggest (a) that the FPP method can be used to provide an accurate parameterization of the peaks in terms of amplitude, latency, and width, and (b) that the FPP remains as the method that best approaches the averaged subjective quality evaluation, as well as provides the best results in terms of sensitivity and specificity in ABR signals validation. The significance of these findings and the clinical value of the FPP method are highlighted on this paper.

Resumo Limpo

record auditori brainstem respons abr use worldwid hear screen purpos process precis estim relev compon essenti accur interpret signal evalu usual carri subject audiologist howev use automat method purpos encourag nowaday order reduc human evalu bias ensur uniform among test condit patient screen personnel articl describ new method perform automat qualiti assess identif peak fit parametr peak fpp method base use synthes peak adjust abr respons fpp valid one hand analysi amplitud latenc measur manual audiologist automat fpp method abr signal record differ stimul rate hand contrast perform fpp method automat evalu techniqu base correl coeffici fsp cross correl predefin templat waveform compar automat evalu qualiti method subject evalu provid five experienc evalu set abr signal differ qualiti result studi suggest fpp method can use provid accur parameter peak term amplitud latenc width b fpp remain method best approach averag subject qualiti evalu well provid best result term sensit specif abr signal valid signific find clinic valu fpp method highlight paper

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