I don't think it would be so straightforward to get Dartel to handle
non-isotropic voxel sizes. Usually, everything is done using
isotropic voxels, so I really haven't looked into how well anisotropic
voxels are handled. I suspect that there would be little or no
benefit from having anisotropic voxels in the imported images anyway.
Best regards,
-John
On 25 January 2011 21:31, kalina michalska <[log in to unmask]> wrote:
> Dear SPM experts,
> I would like to create an anatomical template using the DARTEL Toolbox in
> SPM8. We have acquired 102 high resolution 3D T1 images in young and older
> children.
> I am completely new to using DARTEL. So far, I have used New Segment on each
> T1 image and would like to generate a group template using the rc1 and rc2
> images from each subject.
> My questions (so far!) are as follows: The voxel size of our T1 weighted
> images is 1x.1x1.6mm^3. The SPM8 manual suggests that voxels should be
> isotropic (p. 193, 26.1.4). Is it possible to create a template with
> non-isotropic voxels or is in neccessary that they be isotropic? If so, is
> there any way to make them isotropic in SPM in order to use this toolbox? Is
> it okay to reslice the T1 images?
> Many thanks in advance for your insights,
>
> Kalina
> ---------------------------------------------------
> Kalina J. Michalska, Ph.D.
>
> Postdoctoral scholar
> Social Cognitive Neuroscience Lab
> Department of Psychology
> University of Chicago
>
> Phone: (773) 702-4661
> EMail: [log in to unmask]
> Web: http://scnl.org
>
>
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