{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Obtain previous mammography studies to compare to present study",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "edcf6828-b2c8-5028-b7f7-246cb8d5ac80",
  "concept_id" : "f3b135af-117a-5be2-8606-cae489324575",
  "ancestors" : {
    "111138" : 0
  },
  "id" : "68e874fc-76f1-42a8-b0b4-1537869b3604",
  "code" : "111138",
  "display" : "Old films for comparison",
  "version" : "01"
}