Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 07 :02 is submitted .
    OUTPUT:
    
Nasogastric tube and endotracheal tube are unchanged in position . Overall cardiac and mediastinal contours are unchanged . The lungs remain grossly clear . No pulmonary edema or pleural effusions . No pneumothorax .