Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mildly increased aeration of the left upper lung with near complete opacification of the remaining left lung . The left lower lung can not be well assessed . Increased focal opacity at the right lung base likely represents vascular congestion secondary to volume overload versus redirection of blood flow secondary to large left pleural effusion . A superimposed pneumonia at the right lung base can not be excluded . A small right pleural effusion is noted . The cardiomediastinal silhouette can not be assessed due to the large left - sided pleural effusion . A large pneumothorax is not present .
    OUTPUT:
    
1 . Near complete opacification of the left lung has mildly improved with increased aeration of the left upper lung . 2 . Vascular congestion at the right lung base may be secondary to volume overload versus Re direction of blood flow secondary to large left pleural effusion . A superimposed pneumonia at the right lung base can not be excluded .