Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and reported history of aortic valve replacement . Left internal jugular central venous catheter has been removed . Heart remains moderate to severely enlarged . Mediastinal contours are unchanged . There are low lung volumes . Dense retrocardiac and right patchy bibasilar opacities are similar , and may reflect atelectasis with small effusions , unchanged . There is crowding of bronchovascular structures with probable mild pulmonary vascular congestion , but no overt pulmonary edema . No pneumothorax is seen although the lung apices are obscured by the patient 's chin . Bilateral humeral head prostheses are demonstrated . Multilevel degenerative changes with anterior bridging osteophytes are seen in the thoracic spine .
    OUTPUT:
    
No significant interval change from prior . Persistent bibasilar opacities likely reflecting atelectasis with small bilateral pleural effusions . Mild pulmonary vascular congestion .