Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is tortuous . Hilar contours are normal . The pulmonary vascularity is not engorged . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes of the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .