Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged with mild tortuosity of the thoracic aorta again noted . Lungs are clear and the pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . Widening of the right acromioclavicular joint is better assessed on the dedicated shoulder radiographs obtained the same day .
    OUTPUT:
    
No acute cardiopulmonary abnormality .