Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no pneumothorax or pleural effusion . No new acute rib fractures are seen . Again noted are right - sided old healed rib fractures . The mediastinum and heart are stably enlarged and there is mild vascular congestion . A retrocardiac opacity likely represents a hiatal hernia .
    OUTPUT:
    
Mild pulmonary vascular congestion . No displaced rib fracture seen , although if there is continued clinical concern , a dedicated rib series may be obtained .