Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Unchanged mild cardiomegaly . The mediastinal and hilar contours are unchanged . Again seen is slight leftward deviation of the trachea due to known enlargement of the right thyroid gland . Lungs are hyperinflated with relative lucency suggesting emphysema . There is bibasilar atelectasis . Lungs are otherwise clear . The pulmonary vasculature is normal . No large effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild cardiomegaly , likely emphysema . No acute findings .