tasks/mr/L5_sax_stack/task.json

{
  "schema": "medimageosworld-public-task-v1",
  "task_id": "L5_sax_stack",
  "modality": "MR",
  "level": "L3",
  "goal_text": "Both long-axis localizers have been acquired. Prescribe the ventricular short-axis stack; the SAX Stack Localizer row is already open.\n\nANATOMICAL CRITERIA:\nThe parallel stack should be approximately transverse to the LV base-to-apex long axis in both long-axis reference views, giving ventricular cross-sections rather than oblique long-axis sections. Coverage should extend from the LV apex through two or three additional slices beyond the LV base, toward the atria. Central ventricular slices should show both ventricles in cross-section, with the LV cavity and surrounding myocardium recognizable. Both long-axis views should support the stack orientation and full extent. Mid-LV is halfway along the LV base-to-apex extent, not the middle numbered slice of a stack that extends above the base.\nThese XCAT reference images are diastolic; valve leaflets may not be visible. Use the midpoint of the LV–LA junction and the LV apex to define the LV long axis. A short-axis plane is perpendicular to that long axis.\n\nENDPOINT: The requested prescription has been successfully submitted. Return done at that point; later workline rows are outside this task. Completion of later acquisitions is not required.",
  "budgets": {
    "max_steps": 80,
    "wall_budget_s": 4800.0
  },
  "observation": {
    "mode": "pixels_only",
    "viewport_px": [
      1600,
      1000
    ],
    "notes": "Screenshot of the console each step plus one history image and a compact text history of the last four actions; the full text operator manual; geometry tasks also get reference images of a correctly planned view from a different phantom. The model may request zoomed crops of the current screenshot."
  },
  "allowed_actions": [
    "click",
    "double_click",
    "drag",
    "move",
    "scroll",
    "key",
    "type",
    "wait",
    "done",
    "abstain"
  ],
  "initial_setup": "Both long-axis localizers have been acquired; the SAX Stack Localizer row is open in the editor. Any editable draft prescription starts from a per-episode randomised position and orientation.",
  "visualization": {
    "start_png": false,
    "success_png": false,
    "success_gif": false,
    "note": "visualization pending: this start state is built from upstream acquisitions whose geometry comes from private reference planning that does not exist for the public development phantom",
    "status": "visualization pending"
  }
}