Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is calcified , indicating atherosclerosis The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . There is bibasilar atelectasis . Unchanged fibrous scarring extending from the right hilum to the right apex . Severe upper lobe emphysema . Lungs are otherwise clear . No pleural effusion or pneumothorax is seen . There is a compression deformity of a lower thoracic vertebral body with approximately ___ percent height loss , not significantly changed compared to ___ . Multilevel degenerative changes of the visualized spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Severe emphysema .