Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no confluent opacity to suggest pneumonia or aspiration . No focal pulmonary nodule or mass is identified . There is no pulmonary edema or pleural effusion . No pneumothorax is visualized . Tortuosity of the thoracic aorta is noted . Cardiomediastinal contours are within normal limits and unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .