Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is noted . The aorta is slightly tortuous . Mediastinal and hilar contours are within normal limits . The pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .