Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No pneumothorax or pleural effusion is noted . The cardiomediastinal and hilar contours are unremarkable . Mild to mdoerate multilevel degenerative changes at the thoracic spine are unchanged . Cervical spinal fusion hardware is again seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .