2D Image Region Selection

{
  "resourceType" : "ImagingSelection",
  "id" : "example-2d-image-region-selection",
  "identifier" : [{
    "system" : "urn:dicom:uid",
    "value" : "urn:oid:1.2.840.113747.20080222.3248567223100954657132726086516575.2.1"
  }],
  "status" : "available",
  "code" : {
    "text" : "Region selected from image"
  },
  "subject" : {
    "type" : "Patient",
    "identifier" : {
      "system" : "https://fhirhospital.org",
      "value" : "NTCGFHHKYUYKDPQX"
    }
  },
  "derivedFrom" : [{
    "type" : "ImagingStudy",
    "identifier" : {
      "system" : "urn:dicom:uid",
      "value" : "1.2.840.113747.20080222.324856729726954657132726086516575"
    }
  }],
  "studyUid" : "1.2.840.113747.20080222.324856729726854657132726086516575",
  "seriesUid" : "1.2.840.113747.20080222.324856729726954657132726086516575.1",
  "frameOfReferenceUid" : "1.2.840.113747.20080222.324856823100954657132726086516575.0",
  "instance" : [{
    "uid" : "1.2.840.113747.20080222.324856729726823100132726086516575.1.0",
    "sopClass" : "urn:oid:1.2.840.10008.5.1.4.1.1.2",
    "imageRegion2D" : [{
      "regionType" : "polyline",
      "coordinate" : [0.25,
      0.25,
      0.75,
      0.25,
      0.75,
      0.75,
      0.25,
      0.75]
    }]
  }]
}