The Invited Perspective “The Real Cost of Theoretic Risk Avoidance: The Need to Challenge Unsubstantiated Concerns About 131I Therapy,” by Goldsmith (J Nucl Med. 2011;52:681-682) contains an error in the first sentence of the sixth paragraph. According to title 10 of Code of Federal Regulations part 35.75(a), the originally stated value of 500 mSv in that sentence should have been 5 mSv. The corrected sentence appears below. The author regrets the error.After the 1997 regulatory modification allowing release of patients receiving more than 1,110 MBq of 131I—provided the nuclear practitioner has demonstrated to the licensing authority that patients have been instructed on reasonable isolation and that conditions are such that no member of the public is likely to be exposed beyond 5 mSv—Grigsby et al. (2) distributed radiation-monitoring devices to family members (adults, children, and pets) of patients receiving 3.7–5.5 GBq of 131I.
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