Foreign bodies can be detected easily if they are metallic in nature. However, a radiolucent object is harder to identify on plain radiograph, and a CT scan with multiple window settings is useful in those cases. 

As the right main bronchus is steeper and larger in comparison with left main bronchus, it is more prone for foreign body impaction. In this patient, urgent flexible bronchoscopy was successfully performed to retrieve the foreign body, which was indeed a scarf pin.