def add(dcm)
      s = study(dcm.value(STUDY_UID))
      if s
        s.add(dcm)
      else
        add_study(Study.load(dcm, self))
      end
    end
def add(dcm)
      s = study(dcm.value(STUDY_UID))
      if s
        s.add(dcm)
      else
        add_study(Study.load(dcm, self))
      end
    end
Registers a DICOM object to the patient, by adding it to an existing
 Study, or creating a new Study.

 @param [DICOM::DObject] dcm a DICOM object