Fig. 4From: [18F]FE-PE2I DAT correlates with Parkinson’s disease duration, stage, and rigidity/bradykinesia scores: a PET radioligand validation studyExponential fits of the relationship between symptom duration and [18F]FE-PE2I BPND in putamen, caudate nucleus, sensorimotor striatum, and substantia nigra (n = 41)Back to article page