Two-dimensional spectral processing of sequential evoked potentials.
The processing of sequential evoked potentials (EPs) is investigated using two-dimensional processing techniques. Two-dimensional EP arrays or images are formed by stacking sequential recordings. Processing is accomplished in the frequency domain by 2-D low-pass filtering using Gaussian filters. Auditory brainstem responses (ABRs), which are the early auditory EPs, are used to investigate the effects of the 2-D filtering on real data. Gaussian filtering improves signal-to-noise ratios by reducing high frequency noise effectively in both intra-EP and inter-EP dimensions. Applications to intra-operative monitoring are simulated with real ABR data.
LeBron Paige
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Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33124, USA.
Ozdamar
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Delgado
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D016057:Evoked Potentials, Auditory, Brain Stem; D006801:Humans; D016343:Monitoring, Intraoperative / Q000379:methods; D012815:Signal Processing, Computer-Assisted