Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Patient has been intubated with the tip of the ET tube located 4 .5 cm above the carina . Lungs are clear . No pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
Appropriately positioned endotracheal tube .