Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A new NG tube is present with the tip in the right mainstem bronchus . There is no evidence of complications such as perforation or pneumothorax . A left PICC is in appropriate position in the mid SVC and unchanged from the prior exam . Since the prior exam performed three days prior , mild pulmonary edema has improved . Moderate - to - severe cardiomegaly is stable . The mediastinal contours are unchanged .
    OUTPUT:
    
1 . NG tube in the right mainstem bronchus . 2 . Improvement in pulmonary edema . Results were discussed with Dr . ___ at 15 :36 on ___ via telephone by Dr . ___ at the time the findings were discovered .