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Table 2 Attenuation properties of the tissue substitutes as expected by the MRACs of the system (μdesired) and measured using a PET transmission scan (μmeasured) and CT(μCT)

From: A realistic phantom of the human head for PET-MRI

Tissue μdesired[cm−1] Substitute μmeasured[cm−1] μCT[cm−1]
Bone 0.151 cm −1 Gypsum plaster 0.1501 ± 0.0013 0.1492 ± 0.0006
Brain 0.1 cm −1 Agarose gel 0.0938 ± 0.0004 0.0963 ± 0.0003
Fat 0.0854 cm −1 Silicone 0.0846 ± 0.0015 0.1030 ± 0.0010