Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest tube has been removed since prior . Improved bibasilar atelectasis . There are small pleural effusions , similar . No definite pneumothorax . Shallow inspiration accentuates heart size . Normal pulmonary vascularity . Sternotomy . Small volume retro xiphoid air , in keeping with recent surgery .
    OUTPUT:
    
Improved basilar atelectasis . No pneumothorax . Small pleural effusions .