Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube is in adequate position , terminating 4 .0 cm from the carina . There is opacity in the medial right lung base , which could represent atelectasis but can not exclude aspiration or pneumonia in the right clinical setting . The lungs are otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is top normal in size .
    OUTPUT:
    
1 . ET tube in adequate position , terminating 4 .0 cm from the carina ) . 2 . Opacity medial right lung base , which could represent atelectasis but can not exclude aspiration with right clinical setting .