Brain Uptake and Safety With Probable Alzheimer's Disease, Amnestic Mild Cognitive Impairment and Healthy Volunteers

All subjects will receive an I.V. dose of \[18F\]AH110690 (less than 10 mg of total AH110690). The target activity of a single administration of \[18F\]AH110690 will be 185 MBq (equivalent to a dose of approximately 6 mSv).