Actually a PET scan is the only laboratory technique that will show whether the brain has a dopamine deficit. PET scans however are not commonly available and are expensive. Michel "B. Bruce Anderson" wrote: > I don't know, Marjorie, maybe that "PET" scan shows little "P's'' & > "D's'' each with 4 legs and a tail running around in there bumping into each > other. Actually, that is probably just another of my hallucinations. > Aren't you the one who used to be ''just a librarian?" > > Bruce, > > What does a PET scan show? Or I guess, what does it eliminate? > > I had bad nightmares on two Eldepryl's , I think I'll skip going up > > to 2,000 on Sinemets!!