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Yes that I knew. in particular -s in what modify the ROI? and the 0 1 at the end of -roi command? also could you link me to some tools that convert voxel2mm i didn't find that tools in the link above thank you 2015-09-18 12:17 GMT+02:00 Matthew Webster <[log in to unmask]>: > Hello Carmine, > -s <sigma> is a shortcut for the common operation of creating a > gaussian kernel of <sigma> mm and applying mean filtering ( smoothing ). > -roi takes pairs of voxel co-ordinates and zero all voxels outside of that > rectangular ROI. > > The FLIRT user guide: > > https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/flirt/UserGuide > > covers a number of command line tools that convert between voxel and mm > co-ordinates. > > hope this helps, > Kind Regards, > Matthew > > Dear all, > could someone give me more informations about the follows fslmaths > option: -s <sigma>; -roi <xmin> <xsize> <ymin> <ysize> <zmin> <zsize> > <tmin> <tsize> ? > Also there is a way to convert voxel coordinates in mm? > thank you > > -- > Carmine Pagliaro > *Life is for sharing.* > > > -- Carmine Pagliaro *Life is for sharing.*