Fig. 1

Static images of positron emission tomography (PET)/computed tomography (CT) fusion images at different times. Transverse and midsagittal ¹⁸F-flutemetamol brain PET images were taken at 30, 60, and 90 min post-injection of ¹⁸F-flutemetamol. The standardized uptake values (SUVs) for ¹⁸F-flutemetamol were displayed using a rainbow color scale. In PET/CT images, high accumulation of amyloid-beta protein is related to a reddish to yellowish color and low accumulation corresponds to a bluish to greenish color. The highest ¹⁸F-flutemetamol-uptake was observed in cerebral white matter and brainstem at all time points. The boundaries between the cerebral cortex and white matter became clear over time. a Frontal cortex, b anterior cingulate cortex, c parietal cortex, temporal cortex, and cerebral white matter, d posterior cingulate cortex, e occipital cortex, f cerebellar cortex, and g midbrain, pons, and medulla oblongata