Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube is no longer visualized . The NG tube tip is in the stomach . Lung volumes are low , and there is crowding at the bases and an early infiltrate in these regions can not be excluded . Heart size is mildly enlarged . There is mild pulmonary vascular redistribution .
    OUTPUT:
    
Crowding at the bases . Can not exclude early infiltrate .