John Ashburner wrote:
> The basic rule is that if an image does not have a ".mat" file, then
> the relevant information is obtained from the origin and vox fields
> in the header. The origin and vox fields are limited in the amount
> of information they can contain (origin only to the nearest voxel
> and no information on rotations), so SPM started using ".mat" files.
> Any origin and voxel sizes can be specified in terms of a 4x4 affine
> transformation matrix, but these matrices can also represent rotations.
Does this mean that if I use mat files, I can now set the origin equal to a
fractional rather than integral value (e.g. 64.5 64.5 22) ?
Kevin Black MD