Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion , focal consolidation , or pneumothorax is seen . There are mild degenerative changes in the mid thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .