Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains borderline enlarged . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is normal and the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is demonstrated . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .