Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aortic arch is partly calcified . The lungs are hyperinflated . The mediastinal and hilar contours are otherwise unremarkable . Slight subpleural scarring is noted at each lung apex . There is no pleural effusion or pneumothorax . There is patchy opacity projecting over the left mid to lower lobe suggesting pneumonia , not well seen on the lateral view but suspected to reside primarily in the left lower lobe but perhaps involving the lingula .
    OUTPUT:
    
Findings compatible with pneumonia in the left lower lung .