Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . Lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is present . No acute osseous abnormality is seen . There is minimal degenerative changes within the lower thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .