Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . Aortic knob is calcified . The pulmonary vascularity is not engorged . Streaky bibasilar airspace opacities likely reflect atelectasis . No pleural effusion or pneumothorax is seen . There are multilevel degenerative changes in the thoracic spine . No displaced fractures are evident .
    OUTPUT:
    
Mild bibasilar patchy opacities likely reflective of atelectasis .