{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The TG18-GA25 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 = 25. See [AAPM OR 03]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "edcf6828-b2c8-5028-b7f7-246cb8d5ac80",
  "concept_id" : "f6267ab4-e0e4-56f3-ba97-72268979d30f",
  "ancestors" : {
    "109876" : 0
  },
  "id" : "090cba24-bf46-4ede-90b0-6caac660c8f1",
  "code" : "109876",
  "display" : "TG18-GA25 Pattern",
  "version" : "01"
}