X-ray
From BME Encyclopedia
It is a common misconception by people in the medical community that body piercings will adversely affect the developing of an X-ray film. Jewelry will be visible on an X-ray film in the same way that a medical pin or metal plate is visible (generally showing up as bright white amongst the grayscale of the rest of the film). It will have no adverse effects on the patient, technician, or film.
That said, jewelry can obscure bone and tissues beneath it, thereby increasing the risk that an injury will go unnoticed if it is directly beneath the shadow of the jewelry.