TABLE 3

ROI Analysis

Data type	Basal ganglia	Cerebellum	Frontal	Occipital	Parietal	Pons	Temporal	Central
AC data
PET/MR AC	1.04 ± 0.06	1.04 ± 0.05	0.98 ± 0.03	1.08 ± 0.05	1.03 ± 0.05	0.83 ± 0.05	0.95 ± 0.04	1.05 ± 0.04
PET/CT AC	0.96 ± 0.06	1.01 ± 0.05	1.02 ± 0.04	1.09 ± 0.09	1.08 ± 0.06	0.78 ± 0.08	0.95 ± 0.05	1.12 ± 0.04
Difference between PET/CT and PET/MR	−0.08	−0.03	0.04	0.01	0.05	−0.06	0.00	0.07
% Difference PET/MR (PET/CT = 100%)	8.66	3.01	−4.08	−0.86	−4.49	7.48	−0.11	−6.33
P (PET/CT vs. PET/MR)	P < 0.001	P < 0.001	P < 0.001	NS	P < 0.001	P < 0.001	NS	P < 0.001
NAC data
PET/MR NAC	0.84 ± 0.09	0.97 ± 0.05	1.12 ± 0.05	1.16 ± 0.08	1.15 ± 0.07	0.62 ± 0.07	0.98 ± 0.04	1.16 ± 0.06
PET/CT NAC	0.78 ± 0.11	0.96 ± 0.05	1.12 ± 0.05	1.19 ± 0.09	1.18 ± 0.07	0.57 ± 0.07	0.99 ± 0.05	1.20 ± 0.07
Difference between PET/CT and PET/MR	−0.06	0.00	0.00	0.04	0.03	−0.05	0.01	0.03
% Difference PET/MR (PET/CT = 100%)	7.41	0.13	0.36	−3.34	−2.48	8.13	−0.85	−2.68
P (PET/CT vs. PET/MR)	P < 0.001	NS	NS	P < 0.001	P < 0.001	P < 0.001	NS	P < 0.001

Mean uptake values obtained by ROI analysis, normalized to individual global mean.
NS = no significant difference.