Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Re - demonstration of postsurgical changes from CABG . Heart size is normal . Mild tortuosity of the thoracic aorta . Cardiomediastinal silhouette and hilar contours are otherwise unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . Sternal wires are intact .
    OUTPUT:
    
No acute cardiopulmonary abnormality .