Anatomical MRI scans usually have a resolution of about 1 mm
isotropic, and I still generally recommend using 1.5mm voxel sizes for
the imported images if you used Dartel. You could try working with
higher resolutions, but you may need to do a lot of trial and error
experimenting to obtain suitable values for the regularisation.
Best regards,
-John
On 5 March 2012 10:50, Matura, Silke <[log in to unmask]> wrote:
> Hello,
>
>
>
> I am currently running a vbm analysis in SPM8. The anatomical images were
> acquired with a 3D MDEFT sequence resulting in a voxel size of 1.0mm x 1.0mm
> x 1.0mm. In the VMB Tutorial by John Ashburner (2010) it is suggested to
> choose a value of 1.5mm x 1.5mm x 1.5mm when specifying voxel sizes for
> spatially normalised images during the Dartel to MNI normalisation. Should I
> choose the suggested value, even when the original resolution of my images
> is better (1.0 x 1.0 x 1.0 mm) ?
>
>
>
> I would be very grateful for suggestion on this issue.
>
>
>
> Best regards,
>
> Silke
>
>
>
> Dipl.-Psych. Silke Matura
>
> Laboratory of Neuroscience
>
> Department of Psychiatry, Psychosomatic Medicine and Psychotherapy
>
> University of Frankfurt
>
>
>
> Heinrich-Hoffmann Str. 10
>
> 60528 Frankfurt am Main
>
>
>
> Tel. 069-6301- 83839
>
> [log in to unmask]
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