Table 2.

Agents for in vivo imaging of amyloid-β (Bacskai et al 2002)

Imaging agent	Imaging technique	Signal-to-noise ratio
Thioflavin	Multiphoton	High
Thiazine Red R	Multiphoton	High
(MeO-XO)4	Multiphoton	High
BTA-1	Multiphoton	High
[18F]FDDNP	PET	Low
Aβ peptides	Multiphoton	Moderate
Antibodies	Multiphoton	Very high

Abbreviations: BTA-1, thioflavin T; PET, positron emission tomography; FDDNP, [(2-fluoroethyl) (methyl) amino]-2-naphthyl]ethzlidene) malnonitrile.