Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared with the prior exam performed 2 hr earlier , there has been no significant interval change . Redemonstrated are bibasilar streaky airspace opacities compatible atelectasis versus infection . There is blunting of the bilateral costophrenic angles , which may be secondary to small pleural effusions versus atelectasis . Mild pulmonary vascular congestion is noted . There is no evidence of pneumothorax . The cardiomediastinal silhouette remains enlarged , and is unchanged .
    OUTPUT:
    
1 . No evidence of pneumothorax . 2 . Stable bibasilar airspace opacities which may reflect atelectasis versus infection . 3 . Possible mild pulmonary congestion .