FIG 5. A–F, Comparison of various section thicknesses for single-section 2D images: 2 mm (A), 3 mm (B), 4 mm (C), 5 mm (D); and 30-mm-slab 1-mm-section 3D image (E). In all four volunteers, CSF signal relative to that of the water phantom increased gradually as section thickness increased (arrows in A–E) (F)