Dear Mark
Thanks a lot for your great help. Your clear explanations released my worries.
Thanks again for your very kind help
Very best wishes
Ruiwang
On Wednesday 13 July 2005 17:35, you wrote:
> Hi,
>
> Yes, this isn't about the voxel dimensions - they are 1.0mm and are
> fine. What FSLView is reporting as the coordinate is the coordinates
> that that voxel came from prior to the transformation. The reason
> it is doing this is because you have started with a nifti image that
> thought it had a standard coordinate system - the sform is set to
> 'Aligned Anat' in the GroupAverage images. So when it transformed
> the image to the struct_brain space (which does not have an sform
> set) then it assumed that you wanted to keep a copy of the "standard"
> coordinates. So if the GroupAverage images reported MNI coordinates
> (which I think they do) then the coordinates you see in FSLView
> for the SagMask image is actually the MNI coordinate that this
> voxel corresponds to.
>
> If you don't want to see these standard coordinates, then you can
> unset the sform in the image by using "avworient -deleteorient <filename>"
>
> Hope this is clear and answers your question.
> All the best,
> Mark
>
> R Huang wrote:
> >Dear Mark
> >
> >Really thanks for your kind help for checking my data. The thing confusing
> >me is that the coordinate of the transformed mask is not integer, but a
> >float number. Any comments please?
> >
> >
> >With the best wishes
> >
> >Ruwiang
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Ruiwang Huang
MR-Group
Institute of Medicine
Research Center Juelich
Juelich 52425
Germany
Tel: +49 (0)2461 61 2085
Fax: +49 (0)2461 61 2820
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