Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is no evidence of pneumonia or atelectasis . The heart is mildly enlarged and the aorta is tortuous . The hilar contours are normal . The pleural surfaces are normal without effusion or pneumothorax . There is an old rib fracture on the left , which appears healed .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .