Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is again noted . The aorta is slightly tortuous . Pulmonary vasculature is normal . Hilar contours are unremarkable . Lungs are clear . No pleural effusion or pneumothorax is present . Hypertrophic changes are seen within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .