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Effect of voxel size on signal-to-noise ratio at 3 T. Axial reformat from a sagittal 3-D spoiled gradient echo acquisition with isotropic voxels of (a) 3.0 × 3.0 × 3.0 mm3 (3 s scan time) and (b) 1.5 × 1.5 × 1.5 mm3 (14 s scan time) in a 28-year-old male volunteer. By halving each dimension, the signal-to-noise ratio is reduced by a factor of 8; note the increased image noise in (b)
