Thanks,Is that the same as using fslmaths inputimage -dilM outputimage, with a default of kernel boxv 3?BeddaOn Tue, Oct 13, 2015 at 6:32 PM, Eugene Duff <[log in to unmask]> wrote:Hi Bedda -You need to specify the action in addition to the kernel. e.g. -kernel boxv 3 -dilMCheersEugeneOn 13 October 2015 at 19:16, Bedda Rosario <[log in to unmask]> wrote:Hello,I would like to dilate around each non zero voxel. How can I do this?I tried fslmaths inputimage -kernel boxv 3 outputimage, but nothing happens.Any help is appreciate it.Thank you,Bedda