The investigators will perform whole-body and brain kinetic modeling of SNUBH-NM-333(18F) and optimize the image acquisition procedure.
Five young healthy subjects will be participated in Whole-body positron emission tomography /computed tomographic (PET/CT) scans from the midfemoral position to the head after approximately 5-10 mCi of SNUBH-NM-333(18F) injection. For brain PET/CT amyloid imaging, another five young healthy subjects will be scanned dynamically during windows of 0-180 min after injection of SNUBH-NM-333(18F), with arterial sampling.
The investigators will compare different analysis methods of compartmental modeling and standardized uptake value ratios and determine the optimal acquisition window. And then 10 AD patients and 10 elderly healthy controls will also be participated in brain amyloid imaging to compare SNUBH-NM-333(18F) brain retention in AD patients versus healthy elderly.
