Monte Carlo Simulations of the GE Signa PET/MR for Different Radioisotopes.

Unlabelled: NEMA characterization of PET systems is generally based on F because it is the most relevant radioisotope for the clinical use of PET. F has a half-life of 109.7 min and decays into stable O via β+ emission with a probability of over 96% and a maximum positron energy of 0.