Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube ends approximately 5 cm from the carina . An OG tube ends in the stomach . A retrocardiac opacity is likely the known hiatal hernia . Lung volumes are low , accentuating the bronchovascular structures . There is no definite edema . A small left pleural effusion and left basilar atelectasis is unchanged . There is no pneumothorax . Mild enlargement of the cardiomediastinal silhouette is stable .
    OUTPUT:
    
1 . OG tube in the stomach . 2 . Stable small left pleural effusion and associated atelectasis .