Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph ___ at 04 :47 is submitted . There is substantial overlying motion artifact which limits evaluation .
    OUTPUT:
    
Endotracheal tube unchanged in position . Nasogastric tube is seen coursing below the diaphragm with the tip projecting over the stomach . Bilateral linear opacities likely reflect scarring or atelectasis . Due to the overlying motion , evaluation for subtle interval change can not be assessed . No obvious pulmonary edema . Overall cardiac and mediastinal contours are stable . Right hemidiaphragm remains mildly elevated .