Hello,Registering a binary mask to a different space will probably result in some voxels with fractional intensities using the default interpolation method. The default kernel is 3x3x3, which will, in conjunction with a dilation option, result in a dilation with a one voxel extent.Kind RegardsMatthewI had forgot to binaries my mask. I didn't know that after registering a binary mask to an other space its not binary any more.Does the default kernel dilate the mask by one voxel?Best,MohamadOn Mon, Jan 25, 2016 at 6:56 PM, mohamad reza khodaei <[log in to unmask]> wrote:Thanks for your response.you used the command below?fslmaths roi.nii.gz -kernel 3D -dilM dilateROI.nii.gzFor me, it create an output which is exactly the same with the input!I want my ROI to be dilated by one voxel.Best,MohamadOn Mon, Jan 25, 2016 at 4:34 PM, Matthew Webster <[log in to unmask]> wrote:Hello,The command below worked for me on a test image - how does it fail on your data?Kind RegardsMatthewThanks for your responseI tried -dilM but it didn't worked, which kernel should i use to have dilation by 1 voxel?i tried:fslmaths roi.nii.gz -kernel 3D -dilM dilateROI.nii.gzany idea?bestmohamadOn Tue, Jan 19, 2016 at 8:30 PM, Matthew Webster <[log in to unmask]> wrote:Hello,
fslmaths with one of the -dilM,-dilD,-dilF options should do the job.
Kind Regards
Matthew
> Dear experts,
>
> How can i dilate a ROI by one voxel?
>
> Best regards
--Mohammad Reza Khodaei M.Sc. student of Biomedical Engineering, School of medicine, Shahid Beheshti university, Tehran, Iran--Mohammad Reza Khodaei M.Sc. student of Biomedical Engineering, School of medicine, Shahid Beheshti university, Tehran, Iran--Mohammad Reza Khodaei M.Sc. student of Biomedical Engineering, School of medicine, Shahid Beheshti university, Tehran, Iran
Mohammad Reza Khodaei M.Sc. student of Biomedical Engineering, School of medicine, Shahid Beheshti university, Tehran, Iran