Efficacy and Safety of MNI-672 SPECT for Detection/Exclusion of Cerebral B-amyloid in AD Subjects Compared to HVs.

This is a Phase 1, single center, open-label, non-randomized, clinical study in probable AD patients and HVs to evaluate the efficacy, safety and tolerability of a single dose of MNI-672. The underlying goal of this study is to assess MNI-672 SPECT imaging as a tool to detect ß amyloid deposition in the brain of AD research participants and young healthy male subjects. All study procedures will be conducted at Molecular NeuroImaging (MNI) in New Haven, CT. Approximately 3 patients with AD and 3 young male HVs will be recruited to participate in this study. HVs will be screened to ensure that there is no evidence of cognitive decline or significant neurological deficit. All eligible subjects will be required to visit the study center on at least 2 occasions: 1. for one or more screening visits which should include a history and physical examination, laboratory and extensive neuro-psychological testing and MRI brain scanning. AD subjects will also undergo Amyvid PET imaging as part of the Screening Visit. 2. on one day for baseline examinations and MNI-672 administration and subsequent SPECT scanning- followed by safety measures