{
  "title": "Gallbladder Ultrasound",
  "author": "AhmedAlElg",
  "source": "https://commons.wikimedia.org/wiki/File:Gallbladder_Ultrasound.webm",
  "download_url": "https://upload.wikimedia.org/wikipedia/commons/6/60/Gallbladder_Ultrasound.webm",
  "license": "CC BY-SA 4.0",
  "license_url": "https://creativecommons.org/licenses/by-sa/4.0/",
  "sha256": "b534fd9f9c581d6ae5d07c4f5ae7a910fc83667b685c4215f0b522e8e7b7d8a5",
  "retrieved": "2026-10-23",
  "source_file_changes": "None",
  "display_changes": "Viewport crop [620,220,1080,810] from 1920x1080; rescaled to 716x537. Manual interpolated lumen overlays in selected intervals; no synthetic video frames.",
  "tracking": "No probe poses or calibration available. Body movement maps illustratively to clip time; not spatially registered.",
  "pose": "Source image label LLD; UI model supine and independent.",
  "annotation": "Manual approximate contours in cine.js, CC BY-SA 4.0, not clinically validated. Annotated intervals [0,1] and [2.5,3.5] seconds; no extrapolation."
}