Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal opacity to suggest pneumonia is seen . No pleural effusion , pulmonary edema or gross signs of pneumothorax are seen on this supine radiograph . The cardiomediastinal silhouette is within normal limits for positioning . An orogastric tube is in standard position approximately 4 .5 cm above the carina . An esophageal catheter is in place with tip and side port within the stomach .
    OUTPUT:
    
Standard positions of endotracheal tube and orogastric catheter . Low lung volumes with no focal parenchymal abnormality identified .