Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ the large left pleural effusion is unchanged . There is a small right pleural effusion . Opacities at the left base is most consistent with atelectasis . Focal opacity in the left mid lung zone is likely pleural fluid in the fissue with adjacent atelectasis . Right lung is clear . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . Stable large left pleural effusion and small right pleural effusion . 2 . Atelectasis at the left base .