Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Streaky bibasilar airspace opacities , more pronounced on the left , likely reflect atelectasis . Heart size is normal . The mediastinal and hilar contours are unchanged , with calcification of the thoracic aorta again noted . Pulmonary vascularity is not engorged . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .