Table 2.

Test–retest characteristics of [¹¹C]DPA-713 gray matter-normalized V_T among six participants (three healthy participants and three HIV-positive participants)

Brain region	Test Mean (SD)	Retest Mean (SD)	Error Range			Difference Mean (SD)	ICC
Frontal CTX	0.98 (0.04)	0.96 (0.04)	0.01	to	0.03	0.023 (0.010)	0.81
Temporal CTX	0.94( 0.04)	0.95 (0.04)	−0.06	to	0.02	−0.016 (0.031)	0.67
Parietal CTX	0.93 (0.04)	0.90 (0.06)	−0.01	to	0.06	0.032 (0.026)	0.70
Occipital CTX	1.01 (0.04)	1.01 (0.03)	−0.03	to	0.04	0.003 (0.025)	0.79
Cingulate CTX	1.01 (0.04)	1.01 (0.06)	−0.04	to	0.04	0.002 (0.027)	0.88
Cerebellum	0.96 (0.03)	0.98 (0.03)	−0.04	to	0.01	−0.018 (0.016)	0.74
Precentral gyrus	1.00 (0.02)	0.97 (0.30)	0.01	to	0.07	0.028 (0.020)	0.32
SMC	0.98 (0.05)	0.95 (0.06)	0.00	to	0.08	0.023 (0.034)	0.78
Precuneus	0.98 (0.02)	0.96 (0.03)	−0.01	to	0.05	0.020 (0.022)	0.32
Supramarginal CTX	1.05 (0.05)	1.05 (0.04)	−0.03	to	0.02	−0.001 (0.025)	0.89
Caudate	0.69 (0.09)	0.69 (0.09)	−0.08	to	0.05	0.002 (0.052)	0.87
Putamen	0.93 (0.02)	0.93 (0.05)	−0.05	to	0.04	0.002 (0.042)	0.42
Globus pallidus	1.01 (0.05)	0.99 (0.07)	−0.03	to	0.06	0.028 (0.033)	0.80
Amygdala	1.07 (0.09)	1.05 (0.10)	−0.01	to	0.09	0.026 (0.036)	0.90
Thalamus	1.16 (0.08)	1.15 (0.14)	−0.11	to	0.15	0.017 (0.088)	0.73
HPpHP	0.99 (0.07)	1.00 (0.09)	−0.08	to	0.04	−0.013 (0.043)	0.87
White matter	0.96 (0.06)	0.94 (0.07)	−0.02	to	0.07	0.016 (0.032)	0.86
Whole brain	0.96 (0.03)	0.95 (0.02)	−0.01	to	0.02	0.009 (0.013)	0.78

The regions shown with bold ICC values were used in multiple comparisons

SD standard deviation, CTX cortex, SMC supplementary motor cortex, HPpHP hippocampal/parahippocampal area