Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube , right approach central venous catheter , and enteric catheter are in expected unchanged position . Overall , aeration of the lungs is similar to prior , though with decrease in edema , now mild . A retrocardiac opacity is similar to prior . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Expected positions of support devices . Slight decrease in pulmonary edema , now mild .