Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle opacity is noted in the right lower lung , likely representing atelectasis , less likely pneumonia . No radiopaque foreign body or signs of pneumothorax / pneumomediastinum . Heart size is normal . Bony structures are intact .
    OUTPUT:
    
Subtle opacity in the right lower lung may represent atelectasis versus early pneumonia . No signs of radiopaque foreign body .