Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP supine portable chest radiograph was provided . The endotracheal tube is seen with its tip projecting approximately 4 .3 cm above the carina . The lungs are clear and well inflated . Cardiomediastinal silhouette appears normal . No bony abnormalities .
    OUTPUT:
    
Appropriately positioned endotracheal tube . No acute intrathoracic process .