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Radiation Protection Regulations (SOR/2000-203)

Regulations are current to 2024-06-19 and last amended on 2021-01-01. Previous Versions

SCHEDULE 1(Subsection 1(1))

Organ or Tissue Weighting Factors

Column 1Column 2
ItemOrgan or TissueWeighting Factor
1Gonads (testes or ovaries)0.08
2Red bone marrow0.12
10Thyroid gland0.04
11SkinFootnote for Organ or Tissue Weighting Factors10.01
12Bone surfaces0.01
14Salivary glands0.01
15All organs and tissues not listed in items 1 to 14 (remainder organs and tissues) collectively, namely the adrenals, extra-thoracic region, gallbladder, heart, kidneys, lymphatic nodes, muscle, oral mucosa, pancreas, small intestine, spleen, thymus and prostate or uterus/cervixFootnote for Organ or Tissue Weighting Factors2,Footnote for Organ or Tissue Weighting Factors30.12
16Whole body1.00
  • Return to footnote 1The weighting factor for skin applies only when the skin of the whole body is exposed.

  • Return to footnote 2The weighting factor for the remainder organs and tissues applies to the arithmetic mean dose of the 13 remainder organs and tissues.

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


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