Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains moderately enlarged , and the mediastinal and hilar contours are unchanged with marked tortuosity of the thoracic aorta again demonstrated . The thoracic aorta is also diffusely calcified . The pulmonary vascularity is within normal limits . There are continued small bilateral pleural effusions and bibasilar airspace opacities , which may reflect atelectasis , though infection can not be completely excluded . No pneumothorax is identified , and there are no acute osseous abnormalities .
    OUTPUT:
    
Minimal interval change from prior with continued small bilateral pleural effusions and bibasilar airspace opacities , which may reflect atelectasis , though infection would be difficult to exclude .