FDG PET scans measure brain glucose metabolism and can provide patterns supporting different dementia diagnoses.

“as far as csf goes you know there's a good correlation between the pet and csf findings because i am a geriatric psychiatrist and not a neurologist i'm not typically doing lumbar punctures as part of my practice um generally speaking between the other markers such as you know mri imaging and pet fdg pet which measures how well the brain is using glucose as its fuel and has different patterns supporting one diagnosis over another and that is usually covered by some insurance”