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Table 2 X-ray properties of different materials

From: Abdo-Man: a 3D-printed anthropomorphic phantom for validating quantitative SIRT

    Attenuation coefficient (cm−1)
Material Density (g/cm3) Measured HU 140 keV (Tc-99m) 171 keV (In-111) 254 keV (In-111) 365 keV (I-131) 511 keV (PET)
Water 1.00 0 0.15 0.14 0.13 0.11 0.096
Transparent 1.18 127 ± 15 0.17 0.16 0.15 0.13 0.110
Opaque (white) 1.18 127 ± 15 0.17 0.16 0.15 0.13 0.110
Rubber 0.90 96 ± 15 0.13 0.14 0.15 0.12 0.084
PMMA 1.18 126 ± 15 0.17 0.16 0.15 0.13 0.110