Rosa et al., 2014 used a neurodegenarzive FDG specific PET Template for spatial normalization:
https://www.ncbi.nlm.nih.gov/pubmed/24952892

Akdemir analysed effects of spatial normalization using the 15O-PET SPM template, Rosa et al., 2014 FDG-PET neurodegenrative template AND their own institutional FDG-PET template derived from "brain-healthy": "The Effect of Spatial Normalization of Brain 18F-FDG PET-MR Images Using SPM and Different PET Templates"
http://jnm.snmjournals.org/content/58/supplement_1/1260

It could be interesting implementing these FDG-PET templates in Pypes. I will contact them, to ask, whether they made their templates public!