Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . The mediastinal and hilar contours are stable . No focal consolidation , pleural effusion or pneumothorax is seen . The pulmonary vasculature is normal . Minimal streaky opacity in the left lung base may reflect scarring or subsegmental atelectasis . No acute osseous abnormalities are demonstrated . Remote bilateral rib fractures are again noted . Mild degenerative changes are seen in the imaged thoracic spine as well as within both acromioclavicular joints .
    OUTPUT:
    
No acute cardiopulmonary process .