{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "A Region of Interest (ROI) specified for an image using an overlay shape. Typically used to make reference to specific regions in images, e.g., to specify the location of a radiologic finding in an image or to specify the site of a physical finding by \\\"circling\\\" a region in a schematic picture of a human body. The units of the coordinate values are in pixels.  The origin is in the upper left hand corner, with positive X values going to the right and positive Y values going down. The relationship between a ROI and its referenced Act is specified through an ActRelationship of type \\\"subject\\\" (SUBJ), which must always be present.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ActClass",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_ActClassROI"
  } ],
  "codesystem" : "e17e87cb-d800-524d-8133-b28efac7773e",
  "concept_id" : "3894367d-d9e6-5d58-866d-3e47a68699f0",
  "ancestors" : {
    "ACT" : 3,
    "OBS" : 2,
    "ROIOVL" : 0,
    "_ActClassROI" : 1
  },
  "id" : "3fa2decb-8705-442d-9388-41d7b19263c3",
  "code" : "ROIOVL",
  "display" : "overlay ROI",
  "version" : "2018-08-12"
}