Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Within the limitations of these low lung volumes , there is no focal infiltrate , pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . No displaced fracture is seen .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .