Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is mildly enlarged . The mediastinal and hilar contours are relatively unremarkable . There is no pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is identified . Old fracture of the right ___ posterior rib is noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Low lung volumes .