ArticleBiomedical optics express2026
Neckline-free open-source cap design and improved motion resistance for perioperative fNIRS procedures.
Article in Biomedical optics express, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
Funding
Abstract
Functional near-infrared spectroscopy (fNIRS) caps are limited by motion artifacts and unstable optode-scalp coupling, which degrade signal quality during extended and naturalistic monitoring sessions. We present a fabric-based, chinstrap-free headcap designed to improve mechanical stability and optical signal fidelity through enhanced coupling and reduced relative motion. The open-source cap incorporates a two-layer design with slip-resistant materials and a circumferential tightening mechanism. Performance was evaluated over a two-hour protocol in a mock operating room environment, with motion quantified via image-based tracking, signal quality assessed using signal-to-noise ratio (SNR), scalp-coupling index (SCI), and breath-holding responses, and user comfort evaluated with a human factors questionnaire. Results show reduced displacement and robust hemodynamic signals, supporting improved reliability of fNIRS measurements in perioperative conditions.
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