I think of the indices as referring to the centers of the voxels.
After transforming into mm coordinates, the coordinates refer to the
voxel centers.
Best regards,
-John
On 8 February 2011 08:29, Tuomas Tolvanen <[log in to unmask]> wrote:
> In voxel world, is the voxel's center same as the voxel's index? I mean that if I have voxel index=[1 1 1], does that index refer to voxel's center or corner point? Same question to mm-world. When I extract mm co-ordinates with [b xyz] = spm_read_vols(a), does those mm co-ordinates refer to desired voxel's center or corner point?
>
> br,
>
> Tuomas
>
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