Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Aortic knob is calcified . Mediastinal and hilar contours are unremarkable . Lungs are hyperinflated without focal consolidation . No pleural effusion or pneumothorax is present . Scarring within the lung apices appear symmetric . Pulmonary vasculature is not engorged . No subdiaphragmatic free air is present . There are minimal degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .