Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The patient is status post median sternotomy and CABG . Heart size is mildly enlarged . Mediastinal contours unremarkable . Mild pulmonary vascular congestion is demonstrated . Additionally patchy opacities are seen in the lung bases , more so on the right . No focal consolidation , pleural effusion or pneumothorax is present . Clips are also demonstrated in the region of the gastroesophageal junction .
    OUTPUT:
    
Low lung volumes with patchy bibasilar opacities , more pronounced on the right , likely atelectasis though infection is not completely excluded . Mild pulmonary vascular congestion .