Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mild to moderately enlarged . Heterogeneous opacification of the left lung appears markedly improved . Similarly , there has been improvement in opacities in the right mid - to - upper lung , probably including substantial improvement in the superior segment of the right lower lobe . Patchy opacity layering along the minor fissure suggests atelectasis . A pigtail catheter has been removed . There is recurrent opacification of the right lower hemithorax , probably reflecting pleural effusion , most likely moderate in size but difficult to quantify , as well as increasingly dense opacification of the right middle lobe suggesting atelectasis or consolidation .
    OUTPUT:
    
Improving multifocal parenchymal opacities suggesting resolving pneumonia , but increasing dense opacification of the right lower hemithorax suggesting a combination of pleural effusion with atelectasis or potentially pneumonia .