Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is re- demonstrated . The aortic arch is calcified . Mediastinal and hilar contours are unchanged . Mild pulmonary vascular congestion is demonstrated with upper zone vascular redistribution . Small left pleural effusion is likely present . Patchy bibasilar opacities may reflect atelectasis . No focal consolidation or pneumothorax is identified . Multilevel degenerative changes are again seen in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion and probable small left pleural effusion . Bibasilar atelectasis .