Table 2.

Individual and Group DVRs for each Region of Interest

	Caudate nucleus	Putamen	Anterior cingulate cortex
Control Group
R-1523	1.8	2.0	1.46
R-1524	1.39	1.36	1.19
R-1525	1.92	1.97	1.43
R-1526	1.61	1.82	1.31
Mean (± SEM)	1.68 (0.12)	1.79 (0.15)	1.35 (0.06)
MDMA Group
R-1361	1.43	1.63	1.18
R-1496	1.69	1.83	1.28
R-1498	1.48	1.62	1.18
R-1499	1.5	1.77	1.17
Mean (± SEM)	1.53 (0.06)	1.71 (0.05)	1.20 (0.03)
% Difference	−9.2 (3.4)	−4.3 (2.9)	−10.9 (1.9)
Cocaine Group
R-1268	2.05	2.43	1.44
R-1326	2.26	2.46	1.89
R-1346	2.02	2.21	1.51
R-1427	1.94	2.02	1.35
Mean (± SEM)	2.07 (0.07)	2.21 (0.09)	1.55 (0.12)
% Difference	23.1 (4.1)	27.4 (5.8)	14.6 (8.8)