Different probabilities exist for the occurrence of stochastic radiationEnergy dispersion through matter or space. In atomic physics... effects in various organs and tissues. This different sensitivity to stochastic radiationEnergy dispersion through matter or space. In atomic physics... damage is considered in the ICRPSee 'International Commission on Radiological Protection'. Publication 60, in the Euratom basic standards for Radiation ProtectionRadiation protection deals with the protection of individual... dated May 1996 by the tissue weighting factorSee tissue weighting factor. in calculations of the effective doseMeasure of a radiation effect to be indicated more precisely.... To calculate the effective doseMeasure of a radiation effect to be indicated more precisely..., the individual organ doseThe organ dose HT,R is the product of the organ absorbed dos... values are multiplied by the respective tissue weighting factorSee tissue weighting factor. and the products added.
| Organ |
Tissue weighting factorSee tissue weighting factor. T |
| Gonads |
0.20 |
| Colon |
0.12 |
| Bone marrow (red) |
0.12 |
| Lung |
0.12 |
| Stomach |
0.12 |
| Bladder |
0.05 |
| Chest |
0.05 |
| Liver |
0.05 |
| Thyroid gland |
0.05 |
| Oesophagus |
0.05 |
| Skin |
0.01 |
| Bone surface |
0.01 |
| Adrenals, brain, small intestine, kidney, muscle, pancreas, spleen, thymus, uterus
(the weighting factorSee tissue weighting factor. 0.05 is applied to the average doseMeasure of a radiation effect to be indicated more precisely... of these organs) |
0.05 |
Tissue weighting factors (ICRPSee 'International Commission on Radiological Protection'. Publ. 60, EU BSS 1996)
The numerical values indicated above are valid legal EU-regulations for calculation of the effective doseMeasure of a radiation effect to be indicated more precisely.... In 2007 ICRPSee 'International Commission on Radiological Protection'. published a new set of tissue weighting factors (ICRPSee 'International Commission on Radiological Protection'. Publ. 103: The 2007 Recommendations of the International Commission on Radiological ProtectionThe "International Commission on Radiological Protection", w...) given below. These data are adopted in the proposal of the new EU Basic Safety Standards (European Commission, Proposal for a Council Directive, COM(2011) 593 final, 2011-09-29) for approval by the Council of the European Union.
|
Tissue |
Tissue weighting factorSee tissue weighting factor. wT |
Σ wT |
| Bone-marrow (red), Colon, Lung, Stomach, Breast, Remainder 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 |
|
Total |
1.00 |
|
| * Remainder tissues: Adrenals, Extrathoracic (ET) region, Gall bladder, Heart, Kidneys, Lymphatic nodes, Muscle, Oral mucosa, Pancreas, Prostate, Small intestine, Spleen, Thymus, Uterus/cervix |
|
|
Tissue weighting factors (ICRPSee 'International Commission on Radiological Protection'. 2007)