Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Removal of the right chest tube . There is no evidence of pneumothorax . There is no pleural effusion . Minimal atelectasis in the right perihilar region and at the right lung base is present and unchanged since prior study . Left mild platelike atelectasis in the left lower lung base is also stable . Heart size , mediastinal and hilar contours are in unchanged appearance .
    OUTPUT:
    
No pneumothorax . Minimal bilateral lower lung atelectasis is unchanged .