>1. What is the difference between the Linear AffineComponent
> that SPM2 shows on the output page after 'SpatialNormalization' and the
> Affine Matrix inside the *_sn.matfile?
The displayed matrix "Q" (a mapping from mm in the source image to mm in the
template image) is generated from
Q = VG(1).mat*inv(Affine)/VF.mat
"VG(1).mat" is the voxel-to-world mapping of the template image
"VF.mat" is the voxel-to-world mapping of the source image
"Affine" is the one from the _sn.mat file, and is a mapping from voxels in the
template to voxels in the source image.
>2.How can I apply one of these
> normalization .mat files toan image without going through the whole process
> again?
If you have an sn.mat file, then you can just do the "write normalised only"
option.
Best regards,
-John
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