Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aortic knob is calcified . The mediastinal and hilar contours otherwise are unremarkable . The lungs are hyperinflated with relative lucency in the lung apices compatible with mild underlying emphysema , better demonstrated on the prior CT . The pulmonary vascularity is not engorged . There are no focal opacities , pleural effusions , or pneumothoraces . No acute osseous abnormalities are seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild emphysema .