Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As on prior , extremely low lung volumes are noted . Left chest wall vagal nerve stimulator is again seen . The lungs are grossly clear . There is no effusion or obvious consolidation . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes without acute cardiopulmonary process .