Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right costophrenic sulcus is not included . The left costophrenic angle is blunted . Increased density is again demonstrated in the left lower lobe . This appears slightly more extensive than before . The heart and mediastinal structures are stable in appearance . A nasogastric tube remains in place .
    OUTPUT:
    
Interval increase in extent of left lower lobe opacity . No other significant change .