TABLE 1. Striatal Binding of Cases 1, 2, and 3.

Striatal Binding	Case 1	Case 2	Case 3	Healthy Controls (mean±SD, n = 7)
Right caudate	1.01	1.51	1.86	1.94±0.56
Left caudate	1.10	0.84	1.85	1.98±0.43
Right putamen	0.56	0.81	1.83	1.75±0.38
Left putamen	0.60	0.40	1.70	1.83±0.41

Abbreviation: SD, Standard Deviation.

This parameter was calculated as a specific binding ratio relative to the occipital lobe as a reference tissue. The striatal specific binding ratio is calculated as: (S-O)/O. Where, S is activity in the striatum (caudate or putamen) and O is the activity in the occipital lobe. Any positive number indicates higher binding in the striatum than in the reference region. The reference normal striatal binding values were obtained in seven healthy controls.