Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and tricuspid valve replacement . Cardiac silhouette size is mildly enlarged , but slightly decreased in size compared to the prior exam . The mediastinal and hilar contours are unremarkable . Previous pattern of mild pulmonary vascular congestion has improved . Previously noted small bilateral pleural effusions have essentially resolved with only minimal residual bibasilar airspace opacities likely reflecting atelectasis . No new areas of consolidation are seen . No pneumothorax is identified . The left PICC has been removed .
    OUTPUT:
    
Interval improvement in mild pulmonary vascular congestion and bibasilar atelectasis . Resolution of previously noted small bilateral pleural effusions .