Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity at the left infrahilar region concerning for infection versus aspiration . The lungs are slightly hyperinflated . There is no evidence of pneumothorax or pleural effusions . The heart is normal in size . There is no evidence of pneumoperitoneum . The visualized osseous structures are grossly unchanged .
    OUTPUT:
    
Increased opacity and haziness at the left infrahilar region concerning for acute infection versus aspiration .