Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , however lungs are clear . There is no pneumothorax , or large effusion . The cardiomediastinal and hilar contours are within normal limits . No free air below the right hemidiaphragm . Bony structures are intact .
    OUTPUT:
    
No acute cardiopulmonary abnormality .