Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart is probably enlarged to a mild extent . The left lung base is opacified , involving basilar left lower lobe and lingular consolidations or extensive atelectasis with patchy appearance and possibly a pleural effusion . There is a small pleural effusion on the right .
    OUTPUT:
    
Left basilar opacification . This appearance could be seen with atelectasis or pneumonia , potentially with pleural effusion . Ribs are not well delineated owing to background opacification .