Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Large hiatal hernia is present . The mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is normal . Retrocardiac atelectasis is likely related to the presence of a large hiatal hernia . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Large hiatal hernia .