Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Both lungs are well expanded and without any opacities concerning for aspiration or pneumonia or pulmonary edema . A single drain is seen at the level of the upper trachea in the midline . Cardiomediastinal silhouette is unremarkable . There is no widening of the upper mediastinum . Heart size is normal . There is no pleural abnormality .
    OUTPUT:
    
Clear lungs . No evidence of aspiration or pneumonia or atelectasis .