Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aortic knob is calcified . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Lungs are hyperinflated without focal consolidation . No pleural effusion or pneumothorax is identified . Mild multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .