Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Thin curvilinear radiodensity is again noted projecting over the medial aspect of the right lung apex , likely a retained foreign body , unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .