Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior film , the ET tube and NG tube are no longer visualized . The patient is rotated and his head is turned and the inspiratory volumes are slightly lower , which may account for slightly more prominent appearance of the superior mediastinum . There is upper zone redistribution , without overt CHF . There is bibasilar atelectasis . There is patchy increased retrocardiac density , which may be slightly more pronounced than on the prior film . The right costophrenic angle is obscured by overlying materials and the extreme left costophrenic angle is excluded from the film . Allowing for this , no pleural effusions are seen on either side . Slight elevation the right hemidiaphragm is now visible . No pneumothorax detected . At the upper edge of these films , a fixation plate is seen in relation to the mandible .
    OUTPUT:
    
1 . Interval removal of ET and NG tubes . 2 . The superior mediastinum is slightly more prominent , but this may be accounted for by patient rotation . Attention to this area on followup films is requested . 3 . Patchy bibasilar opacities , probably slightly worse in the retrocardiac region . While this may represent atelectasis , the differential diagnosis , particularly at the left base , includes an early pneumonic infiltrate . Changes of aspiration pneumonitis are also in the differential . 4 . Upper zone redistribution , without overt CHF , similar to the prior film .