Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged with calcification of the aortic knob again noted . Pulmonary vascularity is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . There are multilevel degenerative changes in the thoracic spine , with mild loss of height of an upper lumbar vertebral body .
    OUTPUT:
    
No acute cardiopulmonary abnormality .