Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal and clear . The cardiac silhouette is normal . The mediastinal contours are widened but stable due to a torturous enlarged thoracic aorta . The pleural surfaces are normal . The NG tube traverses the diaphragm but the tip is not visualized .
    OUTPUT:
    
No acute cardiopulmonary process .