Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . The mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Linear opacities in the left lung base likely reflect atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is present . Remote left - sided rib fractures are demonstrated .
    OUTPUT:
    
No radiographic evidence for pneumonia .