Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . The previously seen loculated right pleural effusion now demonstrates an air - fluid level , consistent with prior drainage of the collection . No focal consolidation or mass is seen . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Previously seen right pleural effusion now demonstrates an air - fluid level , consistent with prior drainage of the collection .