Hi,
This is only a problem with the display and the range of values.
Try the following to set it to have a normalized range and get a clean binary mask:
fslmaths ROI1sphere -mul 2 -thr `fslstats ROI1sphere -p 100` -bin ROI1sphere_mask
where "ROI1sphere" is the name of the result you currently have.
All the best,
Mark
> On 21 May 2017, at 15:36, Mike <[log in to unmask]> wrote:
>
> Hi,
>
> I tried to use the following command to create a spherical mask:
>
> fslmaths point_56_n28_52.nii.gz -kernel sphere 10 -fmean -bin sphere_r10
>
> (point_56_n28_52.nii.gz is a single voxel located in the MNI coordinate 56/-28/52, center of the sphere)
>
> When the radius was 6, 8, or 10, it worked well. But when the radius was 12 or 15, it looked weird:
>
> http://imgur.com/a/O6PGs
>
> Does anyone know why?
>
> Mike
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