Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is present . A small hiatal hernia appears to be present . Mediastinal and hilar contours are otherwise unremarkable . Lungs are hyperinflated without focal consolidation . No pleural effusion or pneumothorax is identified . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .