Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , the lungs appear better aerated , with interval improvement in pulmonary edema . Moderate cardiomegaly is unchanged . Again , the endotracheal tube terminates low , within 1 cm above the carina . No pneumothorax .
    OUTPUT:
    
1 . Interval improvement in pulmonary edema . 2 . The endotracheal tube terminates within 1 cm of the carina and should be withdrawn for optimal placement .