source files: xvol.[ch]
(XVOL-MIRROR-VOXELS-AXIALLY :VOXELS <grl:voxels> [ :AXIS <fix:axis> ] )
voxels should be either a rank-three
CLASS-16-BIT-FLOAT-ARRAY or else a graphic relation
holding such an array, named :INTENSITY.
axis should be an integer in [0,2].
This function simply mirrors the voxels along the given axis:
'axis' 0: (i j *) 'axis' 1: (i * k) 'axis' 2: (* j k)
Note: "axially" in the function name means along some axis, as opposed to diagonally: It is not to be taken in the sense of axial vs sagital vs coronal.