Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two views of the chest demonstrate low lung volumes , as seen previously . The cardiac silhouette is top normal in size , exaggerated by low lung volumes . The pulmonary vasculature appears normal . There is no pleural effusion , or pneumothorax . The mediastinal contours are normal .
    OUTPUT:
    
Low lung volumes , without acute chest pathology .