Table 6.

Deviations in broadband absorption and reduced scattering of the Ph-A phantoms when measured at their corresponding ACRIN site, test E1.

Test E1	${\mu }_{\mathrm{a}}$ (${\mathrm{mm}}^{-1}$)		${\mu }_{\mathrm{s}}^{\prime }$ (${\mathrm{mm}}^{-1}$)
	Stdev	NSD (%)	Stdev	NSD (%)
Spectral average	0.0004	5.3	0.01	1.5
Spectral min	0.0001	0.8	0.01	1.4
Spectral max	0.0010	10.8	0.02	1.8
Spectral median	0.0002	5.2	0.01	1.5