Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are within normal limits . Lungs are clear and the pulmonary vascularity is normal . Mild scarring is noted within the lung apices . There are no pleural effusions or pneumothoraces . Mild S - shaped scoliosis of the thoracolumbar spine is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality .