{
  "study": "GRACE reader study (demo)",
  "cases": [
    {
      "case_id": "c001",
      "question": "Is there a focal lung opacity (e.g. pneumonia)? If present, where?",
      "reference_image": "img/c001_ref.png",
      "groundtruth_image": "img/c001_gt.png",
      "items": [
        {
          "item_id": "c001_sysA",
          "image": "img/c001_a.png",
          "answer": "Focal opacity present; likely pneumonia.",
          "decision": "answer"
        },
        {
          "item_id": "c001_sysB",
          "image": "img/c001_b.png",
          "answer": "Uncertain; recommend radiologist review.",
          "decision": "defer"
        }
      ]
    },
    {
      "case_id": "c002",
      "question": "Is there a focal lung opacity (e.g. pneumonia)? If present, where?",
      "reference_image": "img/c002_ref.png",
      "groundtruth_image": "img/c002_gt.png",
      "items": [
        {
          "item_id": "c002_sysA",
          "image": "img/c002_a.png",
          "answer": "Focal opacity present; likely pneumonia.",
          "decision": "answer"
        },
        {
          "item_id": "c002_sysB",
          "image": "img/c002_b.png",
          "answer": "Uncertain; recommend radiologist review.",
          "decision": "defer"
        }
      ]
    },
    {
      "case_id": "c003",
      "question": "Is there a focal lung opacity (e.g. pneumonia)? If present, where?",
      "reference_image": "img/c003_ref.png",
      "groundtruth_image": "img/c003_gt.png",
      "items": [
        {
          "item_id": "c003_sysA",
          "image": "img/c003_a.png",
          "answer": "Focal opacity present; likely pneumonia.",
          "decision": "answer"
        },
        {
          "item_id": "c003_sysB",
          "image": "img/c003_b.png",
          "answer": "Uncertain; recommend radiologist review.",
          "decision": "defer"
        }
      ]
    },
    {
      "case_id": "c004",
      "question": "Is there a focal lung opacity (e.g. pneumonia)? If present, where?",
      "reference_image": "img/c004_ref.png",
      "groundtruth_image": "img/c004_gt.png",
      "items": [
        {
          "item_id": "c004_sysA",
          "image": "img/c004_a.png",
          "answer": "Focal opacity present; likely pneumonia.",
          "decision": "answer"
        },
        {
          "item_id": "c004_sysB",
          "image": "img/c004_b.png",
          "answer": "Uncertain; recommend radiologist review.",
          "decision": "defer"
        }
      ]
    }
  ]
}