{
  "id": {
    "dtype": "byte",
    "description": "sample id"
  },
  "source": {
    "dtype": "byte",
    "description": "dataset source"
  },
  "split": {
    "dtype": "byte",
    "description": "logical split"
  },
  "volume_format": {
    "dtype": "byte",
    "description": "volume encoding"
  },
  "volume_bytes": {
    "dtype": "byte",
    "description": "original nii.gz bytes"
  },
  "label_text": {
    "dtype": "byte",
    "description": "paired text label"
  },
  "volume_path": {
    "dtype": "byte",
    "description": "original GCS path"
  },
  "label_path": {
    "dtype": "byte",
    "description": "original GCS path"
  }
}