Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal without evidence of pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary abnormality .