code: def fit(self, dcm_file1, dcm_file2):
          
          self.set_dicom_file1(dcm_file1)
          self.set_dicom_file2(dcm_file2)
docs: Parameters
          ----------
          dcm_file1: str (path to file) or DicomFile or namedtuple
  
          dcm_file2: str (path to file) or DicomFile or namedtuple