Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The aorta is moderately tortuous . Otherwise , the cardiac , mediastinal and hilar contours appear stable . The lungs appear clear . There no pleural effusions or pneumothorax . The lower thoracic spine curves mildly to the right .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .