Hi

fslmaths <inputmask> -kernel boxv 3 -dilF <outputmask>

Cheers
Saad



> On 27 Feb 2020, at 15:50, Benjamin Ineichen <[log in to unmask]> wrote:
>
> Dear FSL experts,
>
> I have a binary brain mask of a certain brain structure. Is there a way to expand this mask by one voxel on each axis/side, e.g. by using fslmaths or something else?
>
> Many thanks!
> /Ben
>
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