Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are within normal limits . Lungs are clear . Pulmonary vascularity is normal . No pleural effusion or pneumothorax is present . No acute osseous abnormalities are present . Mild degenerative changes are noted within the imaged spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .