Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest provided . An ET tube appears to be at the carina and should be pulled back 2 - 3 cm . An orogastric tube is in standard position . Interval increase in opacification of the left lung base likely represents lung collapse . Mild pulmonary edema appears improved . No pneumothorax . Hilar and cardiomediastinal contours are obscured .
    OUTPUT:
    
1 . An ET tube appears to be at the carina or in the right mainstem bronchus and should be pulled back 2 - 3 cm . 2 . Interval increase in opacification of the left lung base likely represents lung collapse . 3 . Mild pulmonary edema appears improved .