Hi Mirtes,
If you wish to superimpose your group fixed effects analysis then I
would simply use a canonical anatomical image eg. spm/canonical/avg152T1.* or
avg305T1.*.
You could also look at a contrast from a single
subject, whose effects are typical of the group, and superimpose this
on that subjects normalised anatomical.
Best,
Will.
Mirtes Fortes wrote:
> Hi,
>
> I am wondering what is the correct anatomical image that should be used when I
> want to do an overlay of the fmri activations.
>
> I have all the anatomical images of my subjects and I coregistered them with my
> mean epi images, normalized the anatomical individual anatomical images and used
> the parameters estimated in this step to perform the individual epi
> normalization. I performed a fixed effect analysis and want to overlay the
> contrast on an anatomical template. I used to select one subject anatomical
> implane but now I want to use a mean image (as I think it should be the correct
> way). I used SPM2 for all.
>
> I created a mean image of the individual normalized anatomical images using the
> script spm_mean_ui.m in SPM2.
>
> Is it correct to use the mean anatomical image created to overlay activatios?
>
> Thanks,
> Mirtes
>
>
--
William D. Penny
Wellcome Department of Imaging Neuroscience
University College London
12 Queen Square
London WC1N 3BG
Tel: 020 7833 7475
FAX: 020 7813 1420
Email: [log in to unmask]
URL: http://www.fil.ion.ucl.ac.uk/~wpenny/
|