Hi Audrey-Anne,
> I want to make a mean image of all the T1 images of my subjects to show
> group activation. I tried to create a mean image by doing a realignment,
> but there is not enough overlap between images (and it is comprehensible
> because the images come from different subjects, even if I already did
> it with SPM2). Can someone suggest me a way to do that?
Not sure I mis-understood your problem but just to be sure: if you want
to look at group activation maps you have normalized your data, right?
If so, you should be able to create a mean image from the normalized
anatomicals by using ImCalc, for example selecting all your anatomicals
and entering 'mean(X)' as the equation (you will have to change the
'read data into matrix' option to yes and hope that you have neough
memory installed :)
Hope this helps,
best,
Marko
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Marko Wilke (Dr.med./M.D.)
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Universitäts-Kinderklinik University Children's Hospital
Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology)
Hoppe-Seyler-Str. 1, D - 72076 Tübingen
Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473
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