Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes , though with clear lungs . There is no effusion or pneumothorax . Note is made of eventration of the right diaphragm . The heart size is normal . The mediastinal contours are normal . Note is made of degenerative change of the thoracic spine .
    OUTPUT:
    
Low lung volumes , without acute chest pathology .