- The first part of the study is to establish [18F]FEOBV as a PET tracer for application in clinical research by confirming previous findings on [18F]FEOBV validation. This will include dynamic scanning of 3 healthy control subjects in 3 imaging sessions (0-120, 150-180, 210-240 min after injection of [18F]FEOBV). From this part of the study, the optimal short static scan period will be determined by comparing relative uptake values with the results of kinetic analysis.