code: def image_header_info(filename):
      
      if not os.path.exists(filename):
          raise Exception('filename does not exist')
  
      libfn = utils.get_lib_fn('antsImageHeaderInfo')
      retval = libfn(filename)
      retval['dimensions'] = tuple(retval['dimensions'])
      retval['origin'] = tuple([round(o,4) for o in retval['origin']])
      retval['spacing'] = tuple([round(s,4) for s in retval['spacing']])
      retval['direction'] = np.round(retval['direction'],4)
      return retval
docs: Read file info from image header
  
      ANTsR function: `antsImageHeaderInfo`
  
      Arguments
      ---------
      filename : string
          name of image file from which info will be read
  
      Returns
      -------
      dict