Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 13 :21 is submitted .
    OUTPUT:
    
Nasogastric tube is seen coursing below the diaphragm with the tip not identified . The aortic contour appears somewhat prominent but unchanged since ___ at 15 : 18 and therefore is likely positional . Heart remains mildly enlarged . No focal airspace consolidation is seen to suggest pneumonia . No pulmonary edema . Blunting of the left costophrenic angle may reflect scarring or a small effusion . No pneumothorax .