Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is now positioned 5 .5 cm above the level the carina . Lung volumes are unchanged . Persistent left lower lobe atelectasis . Probable small left pleural effusion . No pneumothorax seen .
    OUTPUT:
    
The endotracheal tube is now positioned 5 .5 cm above the trachea .