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Table 1 Tissues from ICRU report 44 [12] and 46 [13]

From: A new tissue segmentation method to calculate 3D dose in small animal radiation therapy

ICRU tissues Physical density ρ (g.cm3) Zeff ρZeff
Lung inflated 0.26 7.88 2.05
Adipose 0.95 6.67 6.34
Yellow marrow 0.98 6.56 6.43
Average soft tissue adult female 1.02 7.44 7.59
Red marrow 1.03 7.44 7.66
Water 1.00 7.73 7.73
Average soft tissue adult male 1.03 7.60 7.83
GI tract 1.03 7.71 7.94
Pancreas 1.04 7.70 8.01
Breast 1.02 7.88 8.04
Eyes lens 1.07 7.54 8.07
Lymph 1.03 7.84 8.07
Testis 1.04 7.82 8.13
Brain 1.04 7.88 8.19
Urinary bladder filled 1.03 7.98 8.22
Kidney 1.05 7.84 8.23
Ovary 1.05 7.84 8.24
Muscle 1.05 7.85 8.24
Lung deflated 1.05 7.88 8.27
Skin 1.09 7.63 8.31
Liver 1.06 7.87 8.34
Spleen 1.06 7.87 8.34
Heart 1.06 7.95 8.43
Blood 1.06 7.97 8.45
Cartillage 1.10 8.33 9.16
Thyroid 1.05 9.19 9.65
Spongiosa 1.18 10.74 12.68
Sacrum 1.29 11.46 14.79
Femur 1.33 12.09 16.08
Humerus 1.46 12.61 18.41
Cranium 1.61 13.13 21.14
Mandible 1.68 13.33 22.40
Cortical bone 5 year Child 1.75 13.56 23.72
Cortical bone 1.92 13.98 26.84