Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph was obtained with the patient in upright position . The ET tube is in the appropriate position at 4 .9 cm above the carina . The NG tube has its tip in the stomach fundus with the side port near the gastroesophageal junction . There are diffuse bilateral opacities , unchanged from perior study . There is no pleural effusion or pneumothorax . The heart size is top normal .
    OUTPUT:
    
Diffuse bilateral opacities , consistent with pulmonary edema given acute time course . However , ARDS or pneumonia may also be considered in the appropriate clinical setting .