Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is nearly total opacification of both lungs . Cardiac size is normal . Apparent widening of the mediastinum is likely secondary to positioning to supine position . No pneumothorax or pleural effusions are seen . An endotracheal tube ends 3 .5 cm above the carina . An esophageal tube has its tip and side port within the stomach . A line crossing across the left upper lung with its tip projecting over the cardiac shadow is likely external .
    OUTPUT:
    
Total opacification of both lungs , compatible with diffuse airspace filling , most likely edema .