Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable view of the chest demonstrates low lung volumes . Bibasilar opacities likely represent atelectasis . Perihilar vascular congestion is noted . Tortuosity of the descending aorta is noted . Heart size is normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes . Bibasilar opacities , likely atelectasis and perihilar vascular congestion .