PET ratios and group-wise mean dynamic PET ratio. (A1) PET ratios within the same transgenic animals for FIBT (x-axis) and florbetaben (y-axis). (A2) Group-wise mean dynamic PET ratio curves for the three radiopharmaceuticals. The four different symbols in A1 mark the individual transgenic animal for which representative Thioflavin S staining images, and plaque load results are given in (B1) to (B4). White arrows point at artefacts in the cerebellum that do not represent amyloid plaques.