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 are within normal limits . Lungs are mildly hyperinflated . No focal consolidation , pleural effusion or pneumothorax is present . Multilevel degenerative changes are seen within the imaged thoracolumbar spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .