Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube is located at the origin of the right mainstem bronchus . The tube could safely be withdrawn 2 - 3 cm . An enteric tube courses into the first portion of the duodenum . A VP shunt is partially imaged . Lung volumes are low . There are bilateral parenchymal opacities compatible with mild pulmonary edema . The heart is mildly enlarged . There is a more focal opacity in the left lower lung , which may reflect infection or asymmetric pulmonary edema . No pneumothorax . There is likely a small left pleural effusion .
    OUTPUT:
    
1 . ET tube should be withdrawn 2 - 3 cm for positioning within the low trachea . 2 . Mild pulmonary edema . 3 . More focal opacity in the left lower lung could reflect infection or asymmetric edema .