Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph ___ at 13 :44 is submitted .
    OUTPUT:
    
Stable cardiac enlargement . Increasing perihilar vasculature and indistinctness favoring developing mild perihilar edema . No pleural effusions . No pneumothorax . Endotracheal tube has its tip 4 .5 cm above the carina . Nasogastric tube courses below the diaphragm with the tip not identified .