Comparison between the two different injection approaches and how the acquired curves appear in a temporal window. (a) TM, (b) SM.
Overview of the entire system. ND: neutral density attenuator; S: injection fibers; B: collection bundle; PMT: photomultiplier tube; A: amplifier; TCSPC: time correlated single photon counting board; : microcontroller unit; and Sync: synchronization signal.
Example of the instrument response function (black points) and of a time-resolved reflectance curve (open symbols) at 690 nm.
Linearity for the absorption and reduced scattering coefficients at 690 nm.
Linearity for the absorption and reduced scattering coefficients at 829 nm.
CV for the absorption and reduced scattering coefficients. The solid lines are the linear fit of CV. (a) CV at 690 nm. (b) CV at 829 nm.
Stability test: percentage variations with respect of the average values of the absorption coefficients at (a) 690 nm and (b) 829 nm.
Arterial occlusion on the left arm. (a) Changes in HHb and on the left (l) and right (r) arm. (b) Time course of the absolute value of the saturation coefficient .
Changes in HHb and during right hand movements. (a) Left hemisphere. (b) Right hemisphere.
Trend of the count rate at 690 nm when it is kept fixed at different values and the count rate at 829 nm is varied. Fixed values: (a) , (b) , (c) , and (d) . The results are shown for three different configurations: SM, TM, and TMR. The solid lines are the linear fit.
Scattering coefficients at 829 nm. First row: and ; second row: and . First column: fixed value of ; second column: fixed value of . The solid lines are the linear fit.
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