Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal supine views of the chest were obtained portably for a total of six images . Low lung volumes result in bronchovascular crowding . The endotracheal tube ends 7 cm above the carina . Nasogastric tube follows the expected course ending below the diaphragm , although the tip is not visualized . Pulmonary vasculature is indistinct , suggesting pulmonary edema . A left basilar opacity is probably a small left pleural effusion . No large pneumothorax or right effusion . No displaced rib fractures .
    OUTPUT:
    
1 . Endotracheal tube ends 7 cm above the carina and could be advanced for more optimal position . 2 . Small left pleural effusion . Preliminary findings discussed with Dr . ___ ( ED ) by phone at 3 :04 p .m . , ___ .