Figure 6a.

Normal amyloid uptake. (a) Axial ¹⁸F-florbetaben-amyloid PET image shows normal uptake throughout the white matter, with sparing of the cortical gray matter. (b) Axial ¹⁸F-florbetaben-amyloid PET image shows spared cerebellar gray matter. Gray-white differentiation should be determined by internal control using the axial imaging plane at the level of the cerebellum, as cerebellar gray matter is almost always spared from amyloid deposition, even in advanced cases of dementia.