[Mind-numbed Robot]

More recently, PET imaging studies using radioligands that bind directly to β-amyloid plaques have been performed.28,29 One of these ligands, Pittsburgh Compound-B (PIB), is a thioflavin derivative and appears to be relatively selective for β-amyloid plaques at the concentrations used for imaging studies. As shown in Figure 2, the binding of PIB to brain sections is highly correlated with total Aβ levels. Test/retest variability in clinical studies is less than 10% for most brain regions.30

I have been saying that for years. Nobody listens.

[neverdem]

I have been saying that for years.

It's too bad that you didn't tell me. I only thought PET scans just measured relative metabolism. That's why I looked at PubMed to substantiate the article's claim.