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The US Nuclear Regulatory Commission’s (NRC’s) revised regulations regarding the medical use of byproduct material became effective on January 14, 2019—six months after being published in final form, and nearly a decade after the proposed rulemaking. See Medical Use of Byproduct Material—Medical Event Definitions, Training and Experience, and Clarifying Amendments, 83 Fed. Reg. 33,046 (July 16, 2018).
The New York Times recently published an important article discussing the tightening supply and uncertain future of MO-99, a short-lived medical isotope widely used for medical diagnostics in the United States and worldwide.