Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube is in satisfactory position 4 .4 cm from the carina . An enteric tube courses below the diaphragm with the tip in the stomach . An esophageal temperature probe is noted at the level of the thoracic inlet . There are diffuse patchy severe bilateral alveolar opacities , worse of the bases of the lungs . There is no pleural effusion or pneumothorax . The mediastinal contours are normal . The heart size is at the upper limits of normal .
    OUTPUT:
    
Satisfactory position of this support devices , as described above . Severe bilateral opacities , of uncertain etiology . These could represent edema , aspiration , infection , or pulmonary hemorrhage .