BBB	blood-brain barrier
CBI	concussive brain injury
GFAP	glial fibrillary acidic protein
IgG	immunoglobulin G
LoC	loss of consciousness
MRI	magnetic resonance imaging
PET	positron emission tomography
repCBI-hf	repetitive CBI—high frequency
repCBI-lf	repetitive CBI—low frequency
SUV	standard uptake values
TBI	traumatic brain injury
TSPO	translocator protein
VOI	volume of interest