Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is top normal . Mediastinal and hilar contours are unchanged . Pulmonary vascularity is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities are seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .