Table 1.

Scattering coefficients of the three phantoms used for validation.

Phantom name	Source of ${\mu \mathrm{s}}^{\prime }$ values	${\mu \mathrm{s}}^{\prime }$ at 760 nm (${\mathrm{mm}}^{-1}$)		${\mu \mathrm{s}}^{\prime }$ at 840 nm (${\mathrm{mm}}^{-1}$)
		Standard	DRS	Standard	DRS
fNIR devices LLC	Provided by the company	1.06	0.93	0.96	0.85
Acrin7	Measured using DOSI	0.66	0.70	0.57	0.60
Scrooge	Measured using DOSI	0.91	0.88	0.82	0.78