Table 1.

Comparison of measured linear attenuation coefficients μ, and refractive index decrements δ with literature values for the material phantom at an effective energy of E_eff = 24.6 keV for the conventional attenuation image and E_eff = 23.8 keV for the phase-contrast image.

	μm [cm−1]	μ1 [cm−1]	δm [10−7]	δ1 [10−7]
NaI (5.9) mg/ml	0.597 ± 0.006	0.609	4.08 ± 0.07	4.07
Blood	0.568 ± 0.006	0.574	4.31 ± 0.07	4.27
Ethanol	0.323 ± 0.006	0.325	3.23 ± 0.06	3.27
PMMA	0.470 ± 0.006	0.470	4.70 ± 0.06	4.70
POM	0.628 ± 0.006	0.628	5.55 ± 0.06	5.55
Nylon	0.423 ± 0.006	0.419	4.61 ± 0.06	4.58
Water	0.523 ± 0.006	0.523	4.07 ± 0.06	4.07

The subscripts m and l indicate measured and literature values. The literature values are calculated from tabulated values from the NIST database²⁵, from²⁶ for blood and from²⁰ for the NaI solution. The given uncertainty includes the standard deviation of the image region and the systematic error.