Hi,
It isn't possible to save an image that is not rectangular.
But you can certainly mask an image by making everything zero outside a
spherical region. The best way is to make a spherical mask and then
just mask with this. To do that I recommend making an image with the
everything zero except the centre voxel (you can easily do this with
the -roi option in fslmaths) and then use the -kernel sphere option
in fslmaths together with -fmean to turn this single voxel into a
sphere. You can then (separately) use this result to mask your image
in fslmaths.
All the best,
Mark
On 18 Feb 2008, at 18:03, Martin M Monti wrote:
> Hi, I know you can use fslroi to create cubic or similar ROIs --
> using it in its first form -- is there a way to produce a spherical
> ROI, specifying the center in voxels/mm and a radius -- for example?
>
> cheers
>
> martin
>
|