4.6 Article

Enhancing Electroretinogram Classification with Multi-Wavelet Analysis and Visual Transformer

Journal

SENSORS
Volume 23, Issue 21, Pages -

Publisher

MDPI
DOI: 10.3390/s23218727

Keywords

biomedical research; classification; deep learning; wavelet analysis; electroretinography; electroretinogram; ERG

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This study aims to improve the classification accuracy of previous work on ERG signals by combining three optimal mother wavelet functions. The results show the feasibility of using Continuous Wavelet Transform for simultaneous analysis of mixed pediatric and adult ERG signals. The modern Visual Transformer-based architectures applied on the time-frequency representation of the signals achieve high classification accuracy, improving the results by an average of 7.6% compared to previous work.
The electroretinogram (ERG) is a clinical test that records the retina's electrical response to light. Analysis of the ERG signal offers a promising way to study different retinal diseases and disorders. Machine learning-based methods are expected to play a pivotal role in achieving the goals of retinal diagnostics and treatment control. This study aims to improve the classification accuracy of the previous work using the combination of three optimal mother wavelet functions. We apply Continuous Wavelet Transform (CWT) on a dataset of mixed pediatric and adult ERG signals and show the possibility of simultaneous analysis of the signals. The modern Visual Transformer-based architectures are tested on a time-frequency representation of the signals. The method provides 88% classification accuracy for Maximum 2.0 ERG, 85% for Scotopic 2.0, and 91% for Photopic 2.0 protocols, which on average improves the result by 7.6% compared to previous work.

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