{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "The AAPM TG18-LPH50 Pattern used to assess display resolution. This pattern has horizontal bars consisting of alternating single-pixel-wide lines across the faceplate of display. The lines have a 50% positive contrast against 10% 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" : "3924d465-72e5-54ab-8e42-4feaf1e020e7",
  "ancestors" : {
    "109856" : 0
  },
  "id" : "3d50d4d2-a9f2-4591-86e9-83e4f913f8e9",
  "code" : "109856",
  "display" : "TG18-LPH50 Pattern",
  "version" : "01"
}