Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate improved atelectasis in the right upper lung and left lower lung from previous imaging . A hazy opacity over the left lung base suggests a layering pleural effusion . A small area of hazy opacity at the right costophrenic angle may represent a small layering pleural effusion . Bilateral pulmonary vascular congestion is again seen , essentially unchanged . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval improvement in atelectasis . Persistent vascular congestion and bilateral pleural effusions , left greater than right .