Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the immediate prior study of earlier the same day , the right base is slightly more aerated . The pericardial drain projects in unchanged position . Tiny biapical pneumothoraces are unchanged . There is no pneumomediastinum . A moderate left pleural effusion is unchanged . The pneumatocele that projects over the left hemithorax is unchanged . There may be a small to moderate right pleural effusion .
    OUTPUT:
    
Slightly improved aeration of the right base , otherwise no change .