docs: def get_slope_and_intercept_from_pdcm(dcmdata):
      """
      Get scale and intercept from pydicom file object.
      :param dcmdata:
      :return:
      """
  
      if hasattr(dcmdata, "RescaleSlope") and hasattr(dcmdata, "RescaleIntercept"):
          rescale_slope = dcmdata.RescaleSlope
          rescale_intercept = dcmdata.RescaleIntercept
          slope, inter = get_slope_and_intercept_from_strings(rescale_slope, rescale_intercept)
      else:
          slope = 1
          inter = 0
  
      return slope, inter