Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable supine chest radiograph was provided . The endotracheal tube is present in the upper trachea , approximately 5 cm above the carina . A nasogastric tube courses below the diaphragm into stomach . Lung volumes are low . There is no focal consolidation , pleural effusion or pneumothorax . There is borderline pulmonary edema . Dense calcification of the aortic knob is noted . The cardiomediastinal silhouette is unchanged . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
1 . Satisfactory positioning of the support devices . 2 . Low lung volumes and borderline pulmonary edema .