Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There is tortuosity of the descending aorta . Sternotomy wires and mitral valve replacements are noted . There is increased opacities at the lung bases bilaterally which likely reflect atelectasis . No large pleural effusion or pneumothorax is identified . Note is made of bilateral rib deformities .
    OUTPUT:
    
Bibasilar opacities likely reflect atelectasis .