Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary vessel congestion , and bilateral pleural effusions are slightly improved compared to ___ . The left upper lung aeration is improved . Cardiomediastinal silhouette is mildly enlarged , but improved from ___ . Right chest tube is unchanged in position .
    OUTPUT:
    
Possible left lung base aspiration is improved . Pulmonary vessel congestion , and bilateral pleural effusions are improved compared to ___ .