TABLE 3

BP_ND Estimates of ¹¹C-Raclopride Before and After PVC in Normal Human Striatum for Various RC_zmin Thresholds Used to Define ROI Spatial Extent

	BP_ND^*
	Caudate		Putamen
Threshold (%)	Observed	After PVC	Observed	After PVC
50	2.18 ± 0.35^†	3.34 ± 0.60^‡	2.87 ± 0.49^†	3.96 ± 0.82^‡
75	2.45 ± 0.39^†	3.37 ± 0.60^‡	3.09 ± 0.54^†	3.97 ± 0.83^‡
90	2.64 ± 0.43^†	3.37 ± 0.60^‡	3.30 ± 0.60^†	3.93 ± 0.83^‡

↵* Mean ± SD over 88-subject group.
↵† Significant difference across observed values (t test, P < 0.01).
↵‡ No significant difference across PVC values (t test, P > 0.95).