Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Extremely low lung volumes are seen . The lungs , however , are grossly clear and there is no effusion . Cardiomediastinal silhouette is within normal limits . Osseous structures are unchanged . No free air is seen below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .