Table 2.

Quantitative results for the effective atomic numbers Z_eff and the electron density ρ_e for the material phantom in comparison to different literature values.

	Zeff,m	${\mathit{Z}}_{\mathbf{eff}\mathbf{,}{\mathbf{l}}_{\mathbf{1}}}$	${\mathit{Z}}_{\mathbf{eff}\mathbf{,}{\mathbf{l}}_{\mathbf{2}}}$	ρe,m⋅[1029 m−3]	ρe,l
NaI (5.9 mg/ml)	7.97 ± 0.06	—	—	3.34 ± 0.07	—
Blood	7.60 ± 0.06	—	7.74	3.54 ± 0.08	—
Ethanol	6.52 ± 0.07	6.35	—	2.69 ± 0.07	2.68
PMMA	6.58 ± 0.03	6.47	6.56	3.86 ± 0.06	3.86
POM	7.05 ± 0.05	6.95	7.03	4.56 ± 0.06	4.56
Nylon	6.24 ± 0.06	6.12	6.21	3.79 ± 0.06	3.76
Water	7.51 ± 0.05	7.42	7.51	3.34 ± 0.06	3.34

The subscript m indicates measured values. For the effective atomic number two different literature sources are given, denoted with l₁ for values from Qi et al.¹⁶ and l₂ for values from the XmuDat library^25,26. The given uncertainty includes the standard deviation of the image region and the systematic error.