Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . Lungs are clear except for a small linear focus of atelectasis or scarring at the left base . No pleural effusion or pneumothorax is evident , and there is no chest radiographic evidence of an acute , displaced rib fracture .
    OUTPUT:
    
No chest radiographic evidence of acute , displaced rib fracture or pneumothorax . If pain is localized to a specific rib , dedicated rib views with markers may be helpful for more complete assessment if warranted clinically .