Researchers at Stichting AMC Foundation and Vrije Universiteit van Amsterdam have identified [18F]-labeled pyrazolidine-3,5-dione compounds targeting P2Y purinoceptor 12 (P2RY12; P2Y12) acting as PET and SPECT imaging agents. They are reported to be useful for the diagnosis of multiple sclerosis, Alzheimer’s disease and Parkinson’s disease.