Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Lung volumes are low . Heart size is difficult to assess given the low lung volumes , but is at least mildly enlarged . There is mild pulmonary vascular congestion . Elevation of the left hemidiaphragm is again noted , with small bilateral pleural effusions visualized . Patchy opacities in the lung bases likely reflect atelectasis . No pneumothorax is seen although the left apex is obscured due to the patient 's chin projecting over this region . Bilateral calcified pleural plaques are again demonstrated , compatible with prior asbestos exposure . Multilevel degenerative changes in the thoracic spine with DISH are again noted .
    OUTPUT:
    
Pulmonary vascular congestion and small bilateral pleural effusions . Bibasilar atelectasis . Calcified pleural plaques indicative of prior asbestos exposure .