Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . Mild to moderate degenerative changes are noted in the thoracic spine . No subdiaphragmatic free air is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality .