Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There opacities in the left lower lobe and probably the lingula , which may be seen with atelectasis or chronic scarring , but possibly pneumonia . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Left lower lobe and lingular opacities suggestive of either atelectasis or pneumonia . Correlation with clinical presentation is suggested .