Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study obtained five hours earlier during the same day . Patient remains intubated . Comparison with the previous study , an NG tube can now be identified , seen to pass well below the diaphragm . Chest findings remain unaltered . Subclavian central venous line on left side , atelectasis in left lower lobe area , pulmonary congestive pattern as before .
    OUTPUT:
    
Successful placement of NG tube .