Hello,
actually, trying it out may tell you if it works :) For Imcalc, you
don't need the images to be in register as it will simply take the
dimensions and voxle sizes from the first image, so "coregister only"
should work for images from the same subject, given that they are
otherwise comparable enough to be coregistered.
If you have images from different subjects, then normalization might be
what you want; on those normalized images you can perform any voxel-wise
operations, including averaging. If you do 'mean(X)', you will need to
activate the option to 'Read data into matrix' or so in the extended
options, which may or may not be advisable, depending on the image
sizes, number of images, and your computer memory :)
Best,
Marko
Joćo Duarte wrote:
> Thank you Torben.
>
> But the CheckReg does not allow me to perform any processing, just
> visualize the images. I was thinking about "Coregister" in the Spatial
> pre-processing panel. Shall I use Reslice or Estimate & Reslice? Can I
> register one image to the other from the same subject or should I
> register both images from the subject to a given template? If the last,
> which template?
>
> Thanks, regards
>
> Joćo
>
> On Mon, Dec 7, 2009 at 11:58 AM, Torben Ellegaard Lund
> <[log in to unmask] <mailto:[log in to unmask]>> wrote:
>
> You could start with CheckReg
>
>
> Best
> Torben
>
>
> Den 07/12/2009 kl. 12.29 skrev Joćo Duarte:
>
>
> Dear SPMers,
>
> if I would like to get an averaged image from 2 (or more) T1
> scans from the the same subject, using mean(X) as the expression
> in ImCalculator, what should I do first to be sure all the scans
> have the same orientation? Otherwise the mean image won't be the
> real average image from all the scans...
>
> Thank you in advance.
>
> Regards,
>
> Joćo
>
>
>
--
=====================================================================
Marko Wilke (Dr.med./M.D.)
[log in to unmask]
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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