Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged , unchanged . Mediastinal and hilar contours are similar with mild unfolding of the thoracic aorta again noted . Atherosclerotic calcifications are noted diffusely throughout the thoracic aorta . Pulmonary vasculature is normal and the lungs are clear . No pleural effusion or pneumothorax is visualized . There are mild multilevel degenerative changes seen throughout the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .