IEEE J Biomed Health Inform - Epsilon-tube filtering: reduction of high-amplitude motion artifacts from impedance plethysmography signal.

Tópicos

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Resumo

The impedance plethysmography (IP) has long been used to monitor respiration. The IP signal is also suitable for portable monitoring of respiration due to its simplicity. However, this signal is very susceptible to motion artifact (MA). As a result, MA reduction is an indispensable part of portable acquisition of the IP signal. Often, the amplitude of the MA is much larger than the amplitude of the respiratory component in the IP signal. This study proposes a novel filtering method to remove the high-amplitude MA's from the IP signal. The proposed method combines the idea of e-tube loss function and an autoregressive exogenous model to estimate the MA while leaving the periodic respiratory component of the IP signal intact. Also, a regularization method is used to find the best filter coefficients that maximize the regularity of the output signal. The results indicate that the proposed method can effectively remove the MA, outperforming the popular MA reduction methods. Several different performance measures are used for the comparison and the differences are found to be statistically significant.

Resumo Limpo

imped plethysmographi ip long use monitor respir ip signal also suitabl portabl monitor respir due simplic howev signal suscept motion artifact ma result ma reduct indispens part portabl acquisit ip signal often amplitud ma much larger amplitud respiratori compon ip signal studi propos novel filter method remov highamplitud mas ip signal propos method combin idea etub loss function autoregress exogen model estim ma leav period respiratori compon ip signal intact also regular method use find best filter coeffici maxim regular output signal result indic propos method can effect remov ma outperform popular ma reduct method sever differ perform measur use comparison differ found statist signific

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