Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The aorta is slightly unfolded . The pulmonary vascularity is normal . The lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .