Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is top normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is seen . Multilevel mild to moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .