Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Slightly low lung volumes are seen . The lungs , however , are grossly clear . There is no effusion or pulmonary vascular congestion . The cardiomediastinal silhouette is within normal limits for technique . No free air is seen below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .