Wearable frequency-domain near-infrared spectroscopy (FD-NIRS) system.

ABSTRACT: Frequency-domain near-infrared spectroscopy (FD-NIRS) is a noninvasive in vivo sensing and imaging technique that is used to quantify tissue composition and oxygen metabolism in the brain, muscle, and other tissues. However, the size and complexity of FD-NIRS instrumentation have largely limited its use to laboratory and clinical research settings. To expand the use of FD-NIRS into continuous monitoring applications and in naturalistic environments, we report a novel real-time multi-frequency (50-350 MHz) wearable FD-NIRS system based on a custom application-specific integrated circuit (ASIC). The wearable device includes 685 nm and 850 nm laser diodes and a silicon photomultiplier (SiPM) detector. The system has an optical property accuracy of 0.0007 mm^-1 for absorption and 0.0

SUBMITTER: Lahade S 

PROVIDER: S-EPMC12904531 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature