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. 2021 Apr 28;21(9):3072. doi: 10.3390/s21093072

Figure 1.

Figure 1

Experimental protocol and NIRS channel settings: (a) Experiment procedures; (b) Channel settings of NIRS with Source 1 and Detector 1 (S1–D1) forming channel 1 (Ch1 for deep layers) and Source 2 and Detector 1 (S2–D1) forming channel 2 (Ch2 for superficial layers); (c) A picture of the experimental setup with the blue box presenting the NIRS sensor.