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Appendix C Thyroid Radiation Dose Estimates for IT as Determined by the Radiation Internal Dose Information Center, Oak Ridge Institute for Science and Education Population Anaktu~uk Pass Arctic Village Fort Yukon White military Other: Estimated Thyroid Doses (rad/~uCi) 2.9 3.8 I.3 I.3 I.3 Radiation dose to the thyroid gland (red) per unit radioactivity of {~3{ administered (microcurie ~,uCi]~. Estimates are based on data provided in Arctic Aeromedical :Laboratory Technical Report 57-36 and the compartmental thyroid mode} of Stabin et al. These estimates have been used in Table 2.3 to calculate average thyroid dose and thyroid cancer risk. Thyroid doses could not be estimated for Wainwright, Point Lay, or Point Hope subjects because of insufficient data in Arctic Aeromedical Laboratory Technical Report 57-36. Estimates for these subjects were based on measurements in the Cristy & Eckerman phantom (Report ORNL/TM- 8381/VI and V7) and data from the Medical Internal Radiation Dose Committee Dose Estimate Report No. 5 as published in Journal of Nuclear Medicine (1975; 16:857-60), assuming 25 percent thyroid uptake of administered il3 l. 87