Hi I can't answer any of your question, but I know who could. The RSO at Massachusetts General Hospital, Rex Woodleigh. They have a pretty big PET program there and I'm sure he'd help you. Not sure if he's on Radsafe. The main number for Mass General is (617) 726-2000, and I don't know his extension.... Ron Amoling amolingr@joslab.harvard.edu Joslin Diabetes Center