Table 4.
First author | fNIRS data pre-processing | |||
---|---|---|---|---|
DPF | Motion artifact correction | Filtering | Additional steps | |
Atsumori et al. 2010 | - N/A | - Not performed | - Not performed | - Baseline correction |
Balardin et al., 2017 | - Not reported | - Not performed | - BP filter [0.01 0.2] Hz | - Down-sampling to 1 Hz |
Doi et al. 2013 | - Not reported | - Not performed | - LP filter 0.05 Hz | - Baseline correction |
Maidan et al. 2016 | - Not reported | - Wavelet-based | - BP filter [0.01 0.14] Hz | - CBSI; Baseline correction |
McKendrick et al. 2016 | - Not reported | - Not performed | - LP FIR filter, 20th order, 0.1 Hz | - Baseline correction |
McKendrick et al. 2017 | - Not reported | - Not performed | - LP FIR filter, 20th order, 0.1 Hz | - Baseline correction |
Mirelaman et al. 2014 | - Not reported | - Not performed | - LP FIR filter, 0.14 Hz | - Baseline correction |
Nieuwhof et al. 2016 | - Constant (6.0) | - MARA | - LP Butterworth filter, 0.1 Hz | - Baseline correction |
Pinti et al. 2015 | - N/A | - Wavelet-based | - BP Butterworth filter, 3rd order, [0.008 0.2] Hz | - Down-sampling to 1 Hz; CBSI |
Takeuchi et al. 2016 | - N/A | - Not performed | - Moving average - BP filter [0.01 0.5] Hz |
- Baseline correction |
Note. Abbreviations: DPF = differential path length factor; BP = Band-pass; LP = low-pass; CBSI = correlation-based signal improvement; FIR = finite impulse response; MARA = movement artifact reduction algorithm.