Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes without overt signs of pneumonia or edema . Heart size is top - normal in size . The mediastinal and hilar contours are normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes without overt signs of pneumonia or edema .