Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube , Swan - Ganz catheter and nasogastric tube are unchanged in position . The Swan ___ catheter tip continues to be in the right main pulmonary artery and should be retracted . The appearance of the lung parenchyma is also unchanged with mild pulmonary edema . There is no new pneumothorax or pleural effusions .
    OUTPUT:
    
1 . Stable mild pulmonary edema . No significant change since the prior study . 2 . Swan - Ganz catheter tip remains in the right main pulmonary artery and should be pulled back for more optimal positioning .