Review of recent advances in frequency-domain near-infrared spectroscopy technologies [Invited]

计算机科学 背景(考古学) 近红外光谱 光学 物理 生物 古生物学
作者
Xinkai Zhou,Yunjia Xia,Julie Uchitel,Liam Collins-Jones,Shufan Yang,Rui Loureiro,Robert J. Cooper,Hubin Zhao
出处
期刊:Biomedical Optics Express [Optica Publishing Group]
卷期号:14 (7): 3234-3234 被引量:9
标识
DOI:10.1364/boe.484044
摘要

Over the past several decades, near-infrared spectroscopy (NIRS) has become a popular research and clinical tool for non-invasively measuring the oxygenation of biological tissues, with particular emphasis on applications to the human brain. In most cases, NIRS studies are performed using continuous-wave NIRS (CW-NIRS), which can only provide information on relative changes in chromophore concentrations, such as oxygenated and deoxygenated hemoglobin, as well as estimates of tissue oxygen saturation. Another type of NIRS known as frequency-domain NIRS (FD-NIRS) has significant advantages: it can directly measure optical pathlength and thus quantify the scattering and absorption coefficients of sampled tissues and provide direct measurements of absolute chromophore concentrations. This review describes the current status of FD-NIRS technologies, their performance, their advantages, and their limitations as compared to other NIRS methods. Significant landmarks of technological progress include the development of both benchtop and portable/wearable FD-NIRS technologies, sensitive front-end photonic components, and high-frequency phase measurements. Clinical applications of FD-NIRS technologies are discussed to provide context on current applications and needed areas of improvement. The review concludes by providing a roadmap toward the next generation of fully wearable, low-cost FD-NIRS systems.
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