Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear , without focal airspace opacity to suggest pneumonia . The heart is not enlarged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Degenerative changes are seen along the spine .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality .