Figure 7.

Results of in vivo imaging in subject 1 are displayed as an axial slice (top row), a coronal slice (second row), and a volume rendering (third row) for each of three cases: before refraction correction, after refraction correction with an assumed skull thickness of 2.5 mm, and after refraction correction with an assumed skull thickness of 3.75 mm. The arrowhead in the axial slices indicates the falx cerebri separating the anterior horns of the lateral ventricles, which increases in brightness after both t = 2.5 and t = 3.75 mm corrections. The star in the axial slices indicates the boundary of the third ventricle, which becomes visible with both corrections. The asterisk in the coronal slices indicates the contralateral sphenoid bone, which is shifted into the field of view as a result of refraction correction. These brightness increases are visible in the volume renderings, as the number of voxels above the threshold for display increases after correcting for refraction.