{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "The AAPM TG18-LPV89 Pattern used to assess display resolution. This pattern has vertical bars consisting of alternating single-pixel-wide lines across the faceplate of display. The lines have a 12% positive contrast against 89% background level of the maximum pixel value. See [AAPM OR 03]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "a6a33ac7-4586-5192-9eab-2e3ab0eb34a8",
  "ancestors" : {
    "109860" : 0
  },
  "id" : "549d7ed2-52fe-4f9a-bfed-132dd1b965d6",
  "code" : "109860",
  "display" : "TG18-LPV89 Pattern",
  "version" : "01"
}