Table 2.

Tissues and weighting factors proposed by the ICRP to estimate effective doses [5]

Tissue	wT	∑ wT
Bone-marrow (red), Colon, Lung, Stomach, Breast, Remainder Tissues* (Nominal wT applied to the average dose to 14 tissues)	0.12	0.72
Gonads	0.08	0.08
Bladder, Oesophagus, Liver, Thyroid	0.04	0.16
Bone surface, Brain, Salivary glands, Skin	0.01	0.04

^*Remainder Tissues (14 in total): Adrenals, Extrathoracic (ET) region, Gall bladder, Heart, Kidneys, Lymphatic nodes, Muscle, Oral mucosa, Pancreas, Prostate, Small intestine, Spleen, Thymus, Uterus/cervix