Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Despite low lung volumes , the lungs are grossly clear . Cardiomediastinal silhouette is within normal limits . Hypertrophic changes are seen in the spine . No free air identified below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .