Early adolescent brain images were acquired on a 1.5 Tesla General Electric Signa LX scanner. A high-resolution structural image was collected in the sagittal plane using an inversion recovery prepared T1-weighted three-dimensional spiral fast-spin echo sequence (repetition time = 2,000 ms, echo time = 16 ms, field of view = 240 mm, resolution = 0.9375 mm × 0.9375 mm × 1.328 mm). Functional imaging was collected in the axial plane using T2*-weighted spiral gradient recall echo imaging (156 repetitions, repetition time = 3000 ms, echo time = 40 ms, flip angle = 90°, field of view = 240 mm, 20 continuous 7 mm slices, in-plane resolution = 1.875 mm × 1.875 mm).
