Choosing an optimal wavelength to detect brain activity in functional near-infrared spectroscopy.
Opt Lett
; 46(4): 924-927, 2021 Feb 15.
Article
en En
| MEDLINE
| ID: mdl-33577549
ABSTRACT
Functional near-infrared spectroscopy (fNIRS) measures human brain function noninvasively. The optical response to oxy- and deoxy-hemoglobin concentration variations during brain activation is wavelength dependent because of the differing spectral shapes of the extinction coefficients of the two hemoglobin species. Choosing the optimal wavelength in fNIRS measurements is crucial to improving the performance of the technique. Here we report on a framework to estimate the spectral response to neural activation in a pre-defined local region. We found that the wavelength that exhibits the largest fractional change in the detected fluence with respect to the baseline value is around 830 nm.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Encéfalo
/
Espectroscopía Infrarroja Corta
Límite:
Adult
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Humans
Idioma:
En
Revista:
Opt Lett
Año:
2021
Tipo del documento:
Article