Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi upright view of the chest provided . Lung volumes are low . There is no focal consolidation , effusion , or pneumothorax . Retrocardiac atelectasis is mild . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . ET tube tip is approximately 4 .2 cm above the carina . OG tube tip is approximately at the level of the carina .
    OUTPUT:
    
ET tube tip is approximately 4 .2 cm above the carina .