On the standardization of positron emitters by 4πγ4πγ counting

This paper focuses on the application of the method known as “4πγ4πγ counting” to the standardization of positron emitters. Measurements and Monte Carlo simulations have been used to determine the optimal conditions of application. Two positron emitters (22Na and 18F) have been standardized, and the results are compared to those obtained by other methods. A good agreement has been found.