Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Even allowing for the projection , the cardiac silhouette is enlarged . There is persistent airspace opacity in the right upper lobe which may reflect asymmetric pulmonary edema versus infection . There is new partial silhouetting of the left hemidiaphragm which may be due to left lower lobe atelectasis or a layering pleural effusion . Mild pulmonary vascular congestion is similar in degree when compared to the prior study .
    OUTPUT:
    
Increased opacity at the left lung base may reflect atelectasis or a layering pleural effusion . Unchanged right upper lobe consolidation .