Dear Sylvain,
I see that you have had quite a lot of responses already.
This is quite a common problem with several possible causes. Often the simplest
fix is set the origin of your mean functional image by hand (using the display
function in spm99) to the ac point (this is the origin of the spm template
images). If some of your images do not contain this point, then you will need to
make a copy of the spm template and alter the origin on this. For the spm
mailbase, try starting with e-mail 001623 (29th June 1999 from J.Ashburner).
Cheers.
Alex.
> I like to normalize T1 & EPI images (30sl, 3.6x3.6x4mm of voxel size) in
> which some part of the brain are missing because of morphological reasons
> (inférior part of cerebellum is often missing). If normalize these images
> to the SPM templates (T1 to T1 template, EPI to EPI template) there are
> distortions in the normalized images: the missing part is filled
> (surrounding parts are warped).
>
> How can I avoid the distortions ? Is there parameters to adjust? Or should
> I create "new templates" from the existing ones that do not include the
> missing part ?
>
> Thanks in advance
>
> Sylvain Clément
>
>
>
>
>
> ---------------------------
> Sylvain Clément
> Bordeaux, FRANCE
> mailto:[log in to unmask]
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