Work

Neckline-free open-source cap design and improved motion resistance for perioperative fNIRS procedures

Year: 2026

Type: article

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.

Source: Biomedical Optics Express

DOI: 10.1364/boe.605391

Authors: Seth Bolton Crawford, Shimra Jaime Fine, Kyla Inez Covato, Caroline Joyce Caveness, Audrey K. Bowden

Language: English

Topic: Optical Imaging and Spectroscopy Techniques

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,913

Funders: Vanderbilt University, National Institutes of Health