Table 3.

Values of relative electron densities (${\rho }_e$) and effective atomic numbers ($Z_{eff}$) from reference and Syngo.Via for the CIRS 062M electron density phantom.

	Reference		Syngo.Via
	${\rho }_e$	$Z_{eff}$	${\rho }_e$	$Z_{eff}$
Lung (Inhale)	0.190	7.332	0.227 ± 0.021	-
Lung (Exhale)	0.488	7.382	0.504 ± 0.021	-
Adipose	0.949	6.370	0.965 ± 0.019	6.420 ± 0.972
BreastTissue	0.976	6.766	0.992 ± 0.020	6.656 ± 0.815
Muscle	1.042	7.383	1.035 ± 0.020	7.514 ± 0.626
Liver	1.052	7.409	1.054 ± 0.021	7.459 ± 0.655
Bone 200 mg/cc	1.116	10.055	1.107 ± 0.025	9.804 ± 0.442
Bone 800 mg/cc	1.454	12.566	1.391 ± 0.029	12.802 ± 0.277
Bone 1250 mg/cc	1.694	13.456	1.621 ± 0.036	13.652 ± 0.285