Liquid-scintillation counting techniques for the standardization of radionuclides used in therapy

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Abstract

Radionuclides are increasingly used in therapeutic nuclear medicine. The CIEMAT/NIST method of standardizing high-energy beta-particle emitters is being applied to a list of candidate radionuclides developed by the US nuclear medicine community. Standards and standard methods are needed by the pharmaceutical manufacturers in North America before these nuclides can be widely distributed. Solutions standardized by liquid-scintillation counting are used to establish counting efficiencies for Cerenkov counting and NaI(T1) well crystals, and potentiometer settings for commercial radionuclide calibrators. Results are presented for a number of beta-particle-emitting radionuclides.

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Physics Laboratory, Technology Administration, US Department of Commerce.

∗∗

Research Associate, U.S. Council for Energy Awareness.

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