[18F]-JNJ-70099731

The purposes of this study are to measure the whole-body distribution and radiation dosimetry of [18F]-JNJ-70099731 (Part A), to measure the uptake, distribution, and clearance (CL) of [18F]-JNJ-70099731 by Positron Emission Tomography (PET) and to model tissue specific kinetics of [18F]-JNJ-70099731 with the appropriate input function (IF) (Part B), and to measure participant test-retest variability in the distribution of [18F]-JNJ-70099731 by comparing PET scans obtained at least 1 week apart (Part C) in the brain of healthy male participants.