Tissue Weighting Factor 1, wT
Tissue Weighting Factor 1, wT : Multiplier of the equivalent dose to an organ or tissue used for radiation protection purposes to account for the different sensitivities of different organs and tissues to the induction of stochastic effects of radiation. The tissue weighting factors recommended by ICRP for calculating effective dose are: Tissue or organ wT Gonads 0.20 Bone marrow (red) 0.12 Colona 0.12 Lung 0.12 Stomach 0.12 Bladder 0.05 Breast 0.05 Liver 0.05 Oesophagus 0.05 Thyroid 0.05 Skin 0.01 Bone surface 0.01 Remainderb 0.05 (a) The weighting factor for the colon is applied to the mass average of the equivalent dose in the walls of the upper and lower large intestine. (b) For the purposes of calculation, the remainder is composed of adrenal glands, brain, extrathoracic region, small intestine, kidney, muscle, pancreas, spleen, thymus and uterus. In those exceptional cases in which the most exposed remainder tissue receives the highest committed equivalent dose of all organs, a weighting factor of 0.025 shall be applied to that tissue or organ and a weighting factor of 0.025 to the average dose in the rest of the remainder as defined here
No records Found