Radiation Protection Regulations (SOR/2000-203)

Regulations are current to 2016-05-12 and last amended on 2015-06-12. Previous Versions

SCHEDULE 1(Subsection 1(1))

ORGAN OR TISSUE WEIGHTING FACTORS

Column 1Column 2
ItemOrgan or TissueWeighting Factor
1Gonads (testes or ovaries)0.20
2Red bone marrow0.12
3Colon0.12
4Lung0.12
5Stomach0.12
6Bladder0.05
7Breast0.05
8Liver0.05
9Oesophagus0.05
10Thyroid gland0.05
11SkinFootnote for ORGAN OR TISSUE WEIGHTING FACTORS 10.01
12Bone surfaces0.01
13All organs and tissues not listed in items 1 to 12 (remainder organs and tissues) collectively, including the adrenal gland, brain, extra-thoracic airway, small intestine, kidney, muscles, pancreas, spleen, thymus and uterusFootnote for ORGAN OR TISSUE WEIGHTING FACTORS 2,Footnote for ORGAN OR TISSUE WEIGHTING FACTORS 30.05
14Whole body1.00
  • Return to footnote 1The weighting factor for skin applies only when the skin of the whole body is exposed.

  • Return to footnote 2When the equivalent dose received by and committed to one of these remainder organs and tissues exceeds the equivalent dose received by and committed to any one of the organs and tissues listed in items 1 to 12, a weighting factor of 0.025 shall be applied to that remainder organ or tissue and a weighting factor of 0.025 shall be applied to the average equivalent dose received by and committed to the rest of the remainder organs and tissues.

  • Return to footnote 3Hands, feet and the lens of an eye have no weighting factor.

 
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