Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates interval removal of nasogastric and endotracheal tubes . A left chest tube is unchanged in position . There is no pneumothorax . Bibasilar atelectasis is slightly increased . Apparent widening of the mediastinum is likely secondary to rotation . The remainder of the exam is unchanged .
    OUTPUT:
    
No pneumothorax . Mild increase in bibasilar atelectasis .