{
  "resourceType" : "Observation",
  "id" : "example-target-lesion",
  "language" : "en",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p>Placeholder RECIST target lesion observation used as a reference target in response assessment examples.</p></div>"
  },
  "status" : "final",
  "code" : {
    "coding" : [{
      "system" : "https://nshr-uat.sha.go.ke/fhir/CodeSystem/sha-interventions-cs",
      "code" : "SHA-IMAGING",
      "display" : "SHA: Oncology Diagnostic Imaging"
    }]
  },
  "subject" : {
    "reference" : "Patient/example-patient"
  },
  "effectiveDateTime" : "2026-03-15",
  "performer" : [{
    "reference" : "Practitioner/example-practitioner"
  }],
  "valueQuantity" : {
    "value" : 18,
    "unit" : "mm",
    "system" : "http://unitsofmeasure.org",
    "code" : "mm"
  }
}