Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , which may relate to chronic obstructive pulmonary disease . No focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . Aortic knob calcification is seen . Some degenerative changes are seen along the spine .
    OUTPUT:
    
No acute cardiopulmonary process .