“…Eighteen follow-up scans were reconstructed as four iterations in 21 subsets, as they were acquired with the AMYPAD protocol. Image processing of the reconstructed PET data was performed using in-house developed scripts using Statistical Parametric Mapping version 12 (SPM12, Wellcome Trust Centre for Neuroimaging, London, UK, https://www.fil.ion.ucl.ac.uk/spm ) running on MATLAB R2018b (Mathworks, Natick, MA, USA), as previously described ( Adamczuk et al, 2016 , Adamczuk et al, 2013 , Koole et al, 2009 , Schaeverbeke et al, 2022 , Vandenberghe et al, 2010 ). Briefly, frames were realigned to the first frame and summed to a single sumPET.…”