Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Both lungs are well expanded . Minimal linear opacity in the left lower lung is likely a small atelectasis . There are no other opacities concerning for pneumonia or aspiration . Both pleural spaces are normal . Heart size is normal . Mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Minimal linear opacity in the left lower lung is likely atelectasis . No other opacities worrisome for pneumonia .