Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . An endotracheal tube is seen terminating approximately 5 .8 cm above the carina . Advancement is recommended by at least 2 - 3 cm . NG tube courses into the left upper quadrant . Heart size is normal . The mediastinal contour appears slightly prominent , likely related to portable semi supine technique . Lungs appear clear aside from mild lower lung atelectasis . No acute fracture .
    OUTPUT:
    
High - riding endotracheal tube , please advance by 2 - 3 cm for more optimal positioning . Mild bibasilar atelectasis .