Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinal drains and nasogastric tube have been removed . The midline sternotomy wires are intact . Bibasilar chest tubes are unchanged in positioning . Bibasilar opacities are likely secondary to atelectasis from low inspiratory volumes . There is no pneumothorax . Mild prominence of mediastinal veins is consistent with mild congestion .
    OUTPUT:
    
1 . No pneumothorax . 2 . Air distended stomach status post nasogastric tube removal . 3 . Postsurgical changes consistent with sternotomy .