Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube , enteric tube and right IJ central venous catheter are unchanged in position . The lung volumes are unchanged . Retrocardiac opacification is again seen , likely reflecting atelectasis . There is mild right basilar atelectasis . Blunting of the right costophrenic angle may reflect small right pleural effusion . The left costophrenic angle remains visible . There is no significant pneumothorax . The cardiomediastinal contours are within normal limits and stable . Known rib fractures are re-demonstrated .
    OUTPUT:
    
1 . Unchanged position of support devices . 2 . Persistent low lung volumes and bibasilar atelectasis . Possible small right pleural effusion .