Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Air - fluid levels are identified within the previously visualized retrocardiac opacity , findings consistent with a stable moderate hiatal hernia . The lungs are clear . There is no focal consolidation or pneumothorax . There is no vascular congestion or pleural effusions . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
1 . Stable moderate hiatal hernia . 2 . No acute cardiopulmonary process . No evidence of aspiration .