Radiation Protection Regulations
Version of the schedule from 2006-03-22 to 2020-11-24:
SCHEDULE 1(Subsection 1(1))
Organ or Tissue Weighting Factors
| Column 1 | Column 2 | |
|---|---|---|
| Item | Organ or Tissue | Weighting Factor |
| 1 | Gonads (testes or ovaries) | 0.20 |
| 2 | Red bone marrow | 0.12 |
| 3 | Colon | 0.12 |
| 4 | Lung | 0.12 |
| 5 | Stomach | 0.12 |
| 6 | Bladder | 0.05 |
| 7 | Breast | 0.05 |
| 8 | Liver | 0.05 |
| 9 | Oesophagus | 0.05 |
| 10 | Thyroid gland | 0.05 |
| 11 | SkinFootnote for Organ or Tissue Weighting Factors1 | 0.01 |
| 12 | Bone surfaces | 0.01 |
| 13 | All 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 Factors2,Footnote for Organ or Tissue Weighting Factors3 | 0.05 |
| 14 | Whole body | 1.00 |
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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