tokens: [ 18F ] ( + ) -4 - fluorobenzyltrozamicol ( FBT ) , which selectively binds to the vesicular acetylcholine transporter in the presynaptic cholinergic neuron , has previously been shown to be a useful ligand for the study of cholinergic terminal density in the basal ganglia with PET .
folded_tokens: [ 18f ] ( + ) -4 - fluorobenzyltrozamicol ( fbt ) , which selectively bind to the vesicular acetylcholine transporter in the presynaptic cholinergic neuron , have previously be show to be a useful ligand for the study of cholinergic terminal density in the basal ganglion with pet .