{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The TG18-GA30 Pattern used for quantitative assessment of veiling glare. This pattern is identical to TG18-GQ except that the radius of the central black circle is varied as r = 30. See [AAPM OR 03]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "edcf6828-b2c8-5028-b7f7-246cb8d5ac80",
  "concept_id" : "9864528a-7fc0-548f-843c-99e756231fda",
  "ancestors" : {
    "109877" : 0
  },
  "id" : "c6432fbd-5356-4d4f-ba89-53362a3aaa76",
  "code" : "109877",
  "display" : "TG18-GA30 Pattern",
  "version" : "01"
}