Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . There is no pulmonary edema . The heart is normal in size , and the mediastinal and hilar contours are normal .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary radiographic abnormality .