Using Workbench Command

DILATE A CIFTI FILE
   wb_command -cifti-dilate
      <cifti-in> - the input cifti file
      <direction> - which dimension to dilate along, ROW or COLUMN
      <surface-distance> - the distance to dilate on surfaces, in mm
      <volume-distance> - the distance to dilate in the volume, in mm
      <cifti-out> - output - the output cifti file

      [-left-surface] - specify the left surface to use
         <surface> - the left surface file

         [-left-corrected-areas] - vertex areas to use instead of computing
            them from the left surface
            <area-metric> - the corrected vertex areas, as a metric

      [-right-surface] - specify the right surface to use
         <surface> - the right surface file

         [-right-corrected-areas] - vertex areas to use instead of computing
            them from the right surface
            <area-metric> - the corrected vertex areas, as a metric

      [-cerebellum-surface] - specify the cerebellum surface to use
         <surface> - the cerebellum surface file

         [-cerebellum-corrected-areas] - vertex areas to use instead of
            computing them from the cerebellum surface
            <area-metric> - the corrected vertex areas, as a metric

      [-bad-brainordinate-roi] - specify an roi of brainordinates to overwrite,
         rather than zeros
         <roi-cifti> - cifti dscalar or dtseries file, positive values denote
            brainordinates to have their values replaced

      [-nearest] - use nearest good value instead of a weighted average

      [-merged-volume] - treat volume components as if they were a single
         component

      [-legacy-mode] - use the math from v1.3.2 and earlier for weighted
         dilation

      For all data values designated as bad, if they neighbor a good value or
      are within the specified distance of a good value in the same kind of
      model, replace the value with a distance weighted average of nearby good
      values, otherwise set the value to zero.  If -nearest is specified, it
      will use the value from the closest good value within range instead of a
      weighted average.  When the input file contains label data, nearest
      dilation is used on the surface, and weighted popularity is used in the
      volume.

      The -*-corrected-areas options are intended for dilating on group average
      surfaces, but it is only an approximate correction for the reduction of
      structure in a group average surface.

      If -bad-brainordinate-roi is specified, all values, including those with
      value zero, are good, except for locations with a positive value in the
      ROI.  If it is not specified, only values equal to zero are bad.