{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The AAPM TG18-RV50 Pattern used for LSF-line spectra function-(1k and 2k) evaluation by 5 vertical lines at 50% luminance level. See [AAPM OR 03]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "edcf6828-b2c8-5028-b7f7-246cb8d5ac80",
  "concept_id" : "60318dce-11f9-57c2-b473-934855d3aca5",
  "ancestors" : {
    "109851" : 0
  },
  "id" : "cdecfd39-b5ec-4141-a371-86c13fd62734",
  "code" : "109851",
  "display" : "TG18-RV50 Pattern",
  "version" : "01"
}