Table 1.

Optical properties of the rat and monkey brains.

Rat (n = 8)	μa (SD) [mm−1]	μs’ (SD) [mm−1]
Gray matter	0.054 (0.017)	1.67 (1.09)
White matter	0.029 (0.015)	2.13 (1.11)
Monkey (n = 1, 3 brain regions)	μa (SD) [mm−1]	μs’ (SD) [mm−1]
Gray matter	0.084 (0.012)	1.97 (0.29)
White matter	0.021 (0.017)	2.40 (0.60)