Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aorta is tortuous . Otherwise , the mediastinal and hilar contours are unremarkable . The lungs appear clear . There are no pleural effusions or pneumothorax . Moderate S - shaped thoracolumbar curvature appears similar .
    OUTPUT:
    
No evidence of acute disease .