Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Central line has been removed . Sternotomy . Band of linear atelectasis left lung base . There is small right pleural effusion , new or better seen since prior . No pneumothorax . No left pleural effusion . Pneumopericardium has decreased . Shallow inspiration accentuates heart size . Normal pulmonary vascularity . Minimal retrosternal air , in keeping with recent sternotomy . Minimal subcutaneous presternal air .
    OUTPUT:
    
There is small right pleural effusion . Pneumopericardium has improved .