Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The endotracheal tube is in adequate position at 3 .9 cm above the carina . There is no visible pneumothorax and no pleural effusion . The mediastinal and cardiac contour are within normal limits .
    OUTPUT:
    
The endotracheal tube is in adequate position . The rest of the exam is within normal limits .