A Long-Lasting Textile-Based Anatomically Realistic Head Phantom for Validation of EEG Electrodes

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Validating new electroencephalography (EEG) electrodes is crucial but challenging due to physiological variability and unknown signal inputs.
• Current head phantoms, often made of ballistic gelatin, suffer from short lifespans and excessive weight.
• Existing phantoms present difficulties in distinguishing noise from actual signals during validation.

Purpose of the Study:

• To develop and evaluate a novel, long-lasting, and lightweight textile-based head phantom.
• To assess the functional performance and anatomical realism of the textile phantom compared to gelatin-based phantoms.
• To determine the suitability of the textile phantom for controlled validation of novel EEG electrodes.

Main Methods:

• Development of an anatomically realistic head phantom using textile-based materials.
• Comparative analysis of the textile phantom's performance against a ballistic gelatin head phantom.
• Measurement and comparison of body-electrode frequency responses and signal-to-noise ratio (SNR).

Main Results:

• The textile-based head phantom demonstrated a significant weight reduction of -91.17% compared to gelatin phantoms.
• The textile phantom accurately mimicked body-electrode frequency responses, comparable to gelatin phantoms.
• The textile phantom achieved a significantly better signal-to-noise ratio (SNR) of 15.95 dB ± 1.666 (±10.45%) at a 95% confidence interval.

Conclusions:

• The developed textile-based head phantom is a durable and lightweight alternative for EEG electrode validation.
• Its comparable functional performance and superior SNR make it ideal for controlled electrode testing.
• This innovation facilitates more reliable and efficient development of new EEG technologies.