Table 2.

MRI sequence and parameters.

Platform	Sequence	Imaging Parameters	Purpose
Phillips (Los Angeles)	T1-weighted MPRAGE	TR = 6.8 ms, TE = 3.2 ms, TI = 845 ms, 170 slices, voxel size = 1 × 1 × 1.2 mm, FOV = 256 mm, flip angle = 8°	Cortical segmentation, & parcellation, & gray matter-white matter contrast
General Electric (San Diego)	T1-weighted IRSPGR	TR = 7.38 ms, TE = 2.984 ms, TI = 640 ms, 166 slices, voxel size = 0.94 × 0.94 × 1.2 mm, FOV = 240 mm, flip angle = 8°	Cortical segmentation & parcellation, & gray matter-white matter contrast
Siemens (Minnesota & Atlanta)	T1-weighted MPRAGE	TR = 2170 ms, TE = 4.33 ms, TI = 1100 ms, 192 slices, voxel size = 1 × 1 × 1 mm, FOV = 256 mm, flip angle = 7°	Cortical segmentation & parcellation, & gray matter-white matter contrast