Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval decrease in the lung volumes causing crowding of the bronchovascular markings and subsegmental atelectasis . No acute focal consolidation , pneumothorax or pleural effusions . Mild pulmonary vascular congestion . No overt pulmonary interstitial edema . Prior CABG , median sternotomy and mitral valve placement .
    OUTPUT:
    
Mild pulmonary vascular congestion .