Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild tortuosity of the thoracic aorta . Mediastinal silhouettes and hilar contours are otherwise unremarkable . Lungs are clear . There is minimal apical scarring . Pleural surfaces are otherwise clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .