Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , but there is no evidence of pneumonia . Left lower paraspinal round density is unchanged since ___ and could be related to hiatal hernia or tortuosity of the aorta . Mediastinal and cardiac contours are unchanged . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
There is no evidence of pneumonia .