Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable including marked tortuosity of the thoracic aorta . The heart is probably at the upper limits of normal size . Streaky opacity in the left mid lung suggests minor atelectasis . The lung volumes are low . Otherwise , within the limitations of technique , the lungs are probably clear . There is no pleural effusion or pneumothorax . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .