Fig. 3From: Reference tissue normalization in longitudinal 18F-florbetapir positron emission tomography of late mild cognitive impairment 18F-florbetapir positron emission tomographic images (zoomed over an axial slice located in the frontal lobe) from two subjects (a) with low tracer uptake and (b) with high tracer uptake, as well as (c) the weighted two-point correlation function (wS2) calculated from whole-brain images of these two subjectsBack to article page