afni.nimh.nih.gov

Hi Marina,

The -dxyz=1 option means the program would
_pretend_ the voxels are cubic mm. That is a
convenience option to make the computations
more simple. Volumes become voxel counts,
and radii are based on 1mm distances.

Since most clustering uses face, edge or corner
sharing to determine the cluster connections,
pretending the voxels are 1 mm works well.

But it is not required, of course.

- rick