Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable supine view of the chest . There has been interval intubation with the tip of the endotracheal tube residing approximately 6 .6 cm above the carina . Left chest wall pacer device is unchanged with prosthetic cardiac valve in midline sternotomy wires again noted . Patient is slightly leftward rotated . Right CP angle is excluded . The heart remains moderately enlarged . The lungs remain mostly clear and hyperinflated .
    OUTPUT:
    
Tip of the ET tube 6 .6 cm above the carina . Advancement by a 1 - 2 cm may result in more optimal positioning .