Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is borderline enlarged , unchanged . Aortic knob calcifications are again noted . The mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .