Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP supine chest film ___ at 09 :55 is submitted .
    OUTPUT:
    
Lung volumes remain relatively low . There is increasing perihilar and airspace opacities throughout both lungs with relative sparing of the right upper lung . Given the interval change , this would favor mild to moderate pulmonary edema rather than an acute infectious process . Overall cardiac and mediastinal contours are stable . Endotracheal tube and right internal jugular central line are unchanged . A nasogastric tube is seen coursing below the diaphragm with the tip not identified . No pneumothorax .