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12 March 2024 A versatile optode attachment to facilitate rapid hair clearance and better through-hair SNR for wider subject inclusivity with fNIRS
Seth B. Crawford, Tiffany-Chau Le, Audrey K. Bowden
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Proceedings Volume 12828, Neural Imaging and Sensing 2024; 1282806 (2024) https://doi.org/10.1117/12.3001814
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
The presence of human hair in the area of sensing interest during functional near-infrared spectroscopy (fNIRS) procedures is a known factor that can prevent proper coupling with the scalp, resulting in signal loss and a reduction in signal-to-noise ratio (SNR). Researchers struggle to find a technique for hair clearance that is accessible, simple and time efficient to operate, and applicable to hair of many different characteristics – including length, shaft thickness, curl or coil, and density. Our group has developed a novel, mechanical attachment compatible with commercial fNIRS systems to facilitate rapid hair clearance and better through-hair SNR for a range of hair types and textures, promoting wider subject inclusivity. Our attachment, named the “Mini Comb,” comprises three parts: a twistable cover, a support piece and six sliding legs. The twistable cover allows the design to be operated by a simple twisting mechanism and has a versatile design that allows it to be deployed in multiple commercial systems. The support piece serves to keep the Mini Comb system connected and in place. The sliding legs move hair strands away from a central region of interest to clear a path for signal acquisition and proper electronics contact with the scalp. We have developed five unique designs for the sliding legs to achieve hair clearance in a wide variety of hair types and subject populations. Results obtained with wigged mannequins show the Mini Comb designs are able to create hair clearance across these variable hair types.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Seth B. Crawford, Tiffany-Chau Le, and Audrey K. Bowden "A versatile optode attachment to facilitate rapid hair clearance and better through-hair SNR for wider subject inclusivity with fNIRS", Proc. SPIE 12828, Neural Imaging and Sensing 2024, 1282806 (12 March 2024); https://doi.org/10.1117/12.3001814
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KEYWORDS
Design
Extrusion
Signal to noise ratio
Head
Signal attenuation
Electronic components
Imaging systems
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