Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There is pneumothorax or large pleural effusion . Biapical pleural scarring is noted . The lungs are hypoinflated but clear without focal consolidation concerning for pneumonia . A left chest wall dual lead pacing device is present with leads terminating in the right atrium and right ventricle as expected . The upper abdomen is unremarkable in appearance . Degenerative changes are seen throughout the thoracic spine .
    OUTPUT:
    
Low lung volumes but no acute cardiopulmonary process .