Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is severely enlarged but unchanged . Dialysis catheter has been removed . Mediastinal and hilar contours are similar , with calcification of the aortic knob again demonstrated . There is mild pulmonary vascular congestion . Assessment of the lung bases is somewhat limited due to underpenetration , though there is likely left basilar atelectasis . No large pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Limited assessment of the lung bases . Mild pulmonary vascular congestion and left basilar atelectasis .