Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are extremely low , and there is unchanged bibasilar atelectasis . The upper lung fields are grossly clear . No large pleural effusion or pneumothorax . The cardiomediastinal silhouette is unchanged in appearance . No interval change in bony thorax .
    OUTPUT:
    
Severely low lung volumes and bibasilar atelectasis . Cardiomediastinal silhouette and bony thorax remain unchanged compared to ___ .