Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine portable view of the chest . Endotracheal tube is seen with tip in approximately 5 cm from the carina , in appropriate position . Enteric tube passes below the diaphragm with tip at the gastric fundus . There is dense retrocardiac opacity which could be due to atelectasis given decreased volume in the left hemithorax although underlying effusion or consolidation is also possible . The right lung is clear . Osseous structures are unremarkable .
    OUTPUT:
    
ET and enteric tubes in appropriate position . Left basilar opacity likely in part due to atelectasis given volume loss in the left with possible underlying effusion or consolidation also possible .