Figure: 25 TAC §289.202(c)(39)

ORGAN DOSE WEIGHTING FACTORS
Organ or Tissue	w_T
Gonads Breast Red bone marrow Lung Thyroid Bone surfaces Remainder	0.25 0.15 0.12 0.12 0.03 0.03 0.30*
Whole Body	1.00**

* 0.30 results from 0.06 for each of five "remainder" organs, excluding the skin and the lens of the eye, that receive the highest doses.

** For the purpose of weighting the external whole body dose, for adding it to the internal dose, a single weighting factor, w_T = 1.0, has been specified. The use of other weighting factors for external exposure will be approved on a case-by-case basis until such time as specific guidance is issued.