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
>
>
|