{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The AAPM TG18-RH89 Pattern used for LSF-line spectra function-(1k and 2k) evaluation by 5 horizontal lines at 89% luminance level. See [AAPM OR 03]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "edcf6828-b2c8-5028-b7f7-246cb8d5ac80",
  "concept_id" : "efb9fb7e-8961-52b6-858c-d556eff7d9f4",
  "ancestors" : {
    "109849" : 0
  },
  "id" : "fd7698bd-2c62-41b9-8d2b-74aea4f5ccdc",
  "code" : "109849",
  "display" : "TG18-RH89 Pattern",
  "version" : "01"
}