Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated raising the possibility of underlying emphysema . No focal consolidation , effusion , edema , or pneumothorax . The heart is normal in size . The descending thoracic aorta is slightly tortuous , similar to its appearance in ___ . The mediastinum is not widened . No acute osseous abnormality .
    OUTPUT:
    
No focal pneumonia . Possible emphysema .