Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The tracheobronchial stent is in unchanged position . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . The pulmonary vasculature is normal . No acute osseous abnormality is identified . Widening of the right acromioclavicular interval is unchanged , and suggests prior trauma .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Unchanged positioning of the tracheobronchial stent .