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Table 1 Tissue weighting factors from ICRP (2007 vs 1991 and 1997)

From: Cancer and non-cancer brain and eye effects of chronic low-dose ionizing radiation exposure

  ICRP 268(1977) ICRP 60 (1991) ICRP 1037(2007
Bladder _ _ _ 0.05 0.04
Bone 0.03 0.01 0.01
Brain _ _ _ _ _ _ 0.01
Breasts 0.15 0.05 0.12
Colon _ _ _ _ _ _ 0.12
Esophagus _ _ _ 0.05 0.04
Liver _ _ _ 0.05 0.04
Lower large intestine _ _ _ 0.12 _ _ _
Lungs 0.12 0.12 0.12
Ovaries/testes 0.25 0.20 0.08
Red marrow 0.12 0.12 0.12
Remainder tissues 0.30 0.05 0.12
Salivary glands _ _ _ _ _ _ 0.01
Skin _ _ _ 0.01 0.01
Stomach _ _ _ 0.12 0.12
Thyroid   0.05 0.04
  1. Adapted from refs 7, 26 and 27.