Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The cardiac , mediastinal and hilar contours are within normal limits . The lungs are clear . There is no pneumothorax or pleural effusion . Lumbar spinal fusion hardware is partially visualized . There is no change from prior radiographs ___ .
    OUTPUT:
    
No acute cardiopulmonary process .