TABLE 1

Mean Uptake, Intersubject Variability, Test–Retest, and Right-to-Left Asymmetry Indices Obtained Using Predefined VOI Analysis

Region	Mean	SD	Intersubject (%)	Test–retest (%)	R/L ratio	SD	Volume (cm³)
¹⁸F-FDG (whole-brain normalized uptake)
Cerebral cortex	0.996	0.017	1.7	2.6	0.998	0.004	0.312
Frontal cortex	1.045	0.034	3.3	2.7	0.994	0.007	0.134
Sensorimotor cortex	1.070	0.021	1.9	2.8	0.999	0.005	0.105
Temporal lateral cortex	0.949	0.032	3.3	2.0	0.997	0.018	0.013
Temporal medial cortex	0.881	0.023	2.6	1.2	0.963	0.017	0.060
Hippocampus	0.979	0.016	1.7	0.6	0.987	0.006	0.115
Hypothalamus	0.912	0.025	2.7	2.3	0.984	0.012	0.027
Pituitary gland	0.807	0.052	6.4	6.1	0.989	0.022	0.003
Caudate-putamen	1.022	0.020	2.0	1.4	0.983	0.010	0.085
Lateral globus pallidus	0.972	0.019	1.9	1.4	0.990	0.014	0.009
Medial globus pallidus	0.999	0.020	2.0	2.6	0.999	0.016	0.001
Thalamus	1.095	0.031	2.9	1.9	1.002	0.008	0.055
Pons	0.988	0.022	2.3	2.4	0.977	0.011	0.005
Cerebellum	1.007	0.028	2.7	5.4	1.013	0.009	0.253
Nucleus accumbens	0.995	0.022	2.3	1.6	0.995	0.017	0.011
¹¹C-Raclopride binding index
Caudate-putamen	2.451	0.271	11.0	14.0	0.985	0.050
Nucleus accumbens	1.645	0.233	14.2	8.5	1.066	0.068
¹⁸F-FECT binding index
Caudate-putamen	8.888	0.473	5.3	7.7	0.994	0.018
Nucleus accumbens	6.975	0.674	9.7	10.4	1.051	0.066