Table 2.
fNIRS recording | |
Optode placement |
Optimal solution:
|
Source–detector separation |
|
Baseline recording |
|
fNIRS data processing: conversion and artefact removal | |
Conversion of optical density changes into concentration changes of chromophores (e.g. oxyHb, deoxyHb, totHb) |
|
- DPF value determination |
Optimal solution:
|
Artefact removal | |
Removal of motion artefacts * |
|
Removal of physiological artefacts |
|
General artefact removal |
|
fNIRS data processing: further analysis | |
Detrending |
|
Analysis |
|
deoxyHb: deoxygenated hemoglobin; DPF: differential path length factor; EEG: electroencephalography; fNIRS: functional near-infrared spectroscopy; GLM: general linear model; : absorption coefficient; MRI: magnetic resonance imaging; oxyHb: oxygenated hemoglobin; SDS: short-separation channel (also known as short-distance channel); SNR: signal-to-noise ratio/* Filtering of motion artefacts can also be conducted on optical density data (before conversion into concentration changes) depending on the used filter methods and/or software solution. / # Please note, if distinct types of GLM are used (e.g., GLM with model correction methods) the processing steps are divergent from those shown in the table and some of the given recommendations do not apply in this particular case.