Translate names and indices of 3D image planes. The names only make sense if the data in the volume is in the default FreeSurfer conformed orientation.
vol.planes(plane = NULL)NULL, a plane index, or a plane name.
if `plane` is NULL, all available planes and their indices as a named list. If `plane` is an integer (a plane index), its name. If `plane` is an characters string (a plane name), its index.
Other volume utility:
vol.boundary.box(),
vol.imagestack(),
vol.merge(),
vol.overlay.colors.from.activation(),
vol.slice()