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Dear Carolyn, I'm not aware of one (and am not an FDG person) but if you find out I'd be grateful if you could share that knowledge. I've done a sabbatical in France last year - that group did have younger FDG controls, but definitely not in a public database format. If you find any, you'd need to check how comparable the controls are to your subjects of study - e.g. injected dose, time (onset) and length of scanning, type and resolution of scanner, positioning within scanner, type of attenuation correction, method of reconstruction, movement detection and correction... I've been thinking about shared control databases for a while but the practical difficulties are likely to be formidable, even for a deceptively "simple" tracer like FDG. It may be worth contacting scanner manufacturers. Do let us know if you find anything out, Best wishes, Alexander -----Original Message----- From: SPM (Statistical Parametric Mapping) [mailto:[log in to unmask]] On Behalf Of Carolyn L. Fort Sent: 14 December 2007 20:33 To: [log in to unmask] Subject: [SPM] public access PET databases? Hello. Is anyone aware of public access databases containing normative PET-FDG data for subjects under 65 yrs of age? I've checked the LONI (Lab. of Neuro Imaging) databases at UCLA, for example, but am having difficulty locating healthy controls. Thanks, in advance. Carolyn Carolyn L. Fort Research Specialist, Senior Department of Psychiatry University of Arizona PO Box 245002 Tucson, AZ 85724-5002 v: 520-626-8568 f: 520-626-6050