Katrin,
if you go to defaults and disable the non-linear function, nothing will
happen but an affine transformation (it will also say so in the graphics
window, i.e. in spm99.ps). I think it always asks the questions on the
iterations, no matter what. Alternatively, you can do it by command line
usage of spm_sn3d.m: call it via
spm_sn3d('test.img','test_sn3d.mat',[-78 -112 -50 ; 78 76 85],[1 1
1],[1 0 1 1 8 0.1],'T1.img','brainmask.img');
(with all files present in your workdir), and since one of the basis
functions is set to 0 (look at spm_sn3d.m for details), none will be
applied. If you write lines like this for all your files and put them in
a text-file (which you rename to xxx.m), you have a poor mans' batch
mode for normalization :)
Best
Marko
"Blank, Katrin" wrote:
>
> Dear SPMers,
>
> I want to compare the normalisation results of patients' scans
> masked and normalised with and without non-linear functions.
> Using the defaults for normalisation parameters, I can remove
> non-linear basis functions but I still have to chose the number
> of iterations etc. How can I disarm the non-linear functions?
> Thankyou
--
===============================================
Marko Wilke, MD
Research Fellow, Imaging Research Center
Children's Hospital Research Foundation
3333 Burnet Avenue - ML 5031
Cincinnati, OH 45229
Phone +1 (513) 636-0142 FAX +1 (513) 636-3754
[log in to unmask] http://www.irc.chmcc.org
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