Defined in file : brainvisa/toolboxes/nuclearimaging/types/OLDPetSubjectTypes.py
BrainVISA volume formats
{center}/{subject}/pet/{acquisition}/{tracer}/PET_{reconstruction}/<subject>_<acquisition>_PET_Masks/<subject>_<acquisition>_<reconstruction>_PET_Grey_matter_lite_Mask
center , subject , acquisition , tracer , reconstruction