Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Attenuation of pulmonary vascular markings towards the apices is compatible with centrilobular emphysema . No focal consolidation , pleural effusion or pneumothorax is present . There is no pulmonary edema . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Emphysema .