Fig 1.
Scheme of the experimental setup and the LSCI pattern plotted using the results averaged over the whole image.
LD—laser diode, P1 and P2—linear polarizers, D—diffuser.
Fig 2.
Scheme of three experimental protocols: Controlled respiration test (CRT), breath holding test (BHT), venous occlusion test (VOT).
Fig 3.
Wavelet spectra averaged over different roi, green colour indicate data obtained during SR, red—CRT.
Dots indicate outliers.
Fig 4.
Box whisker diagram describes the wavelet coherence of oscillation of blood flow compared with the surrogate data (plotted by gray) during SR (a) and CRT (b).
Dots indicate outliers.
Fig 5.
Samples of LSCI perfusion averaged over the total ROI upper curves, and three random roi (3 lower curves) in 4 time intervals.
Green curves—LSCI perfusion before the BHT, red—during the BHT, gray—transitional period, blue—recovered perfusion 1.5 min after the BHT.
Fig 6.
Spectra (a) and coherence (b) in 4 time intervals.
Green curves—LSCI perfusion before the BHT, red—during the test, gray—transitional period, blue—recovered perfusion 1.5 min after the BHT. The color scheme is the same as in Fig 5.
Fig 7.
Averaged spectra (a) and coherence (b) of LSCI perfusion curves obtained at different roi during the VOT; green colour indicates data obtained during the SR, red—during the VOT, blue—during the SR after the VOT.
Dots indicate outliers.