Could be. I'm in a similar situation as your wife -- wrist and partial hand reconstruction -- but I'm under strict guidance to avoid MRIs, and have to report as such at hospitals and doctors' offices. I've also got a metal fixture in one of my toes on my left foot -- but, for whatever reason, that one's never caused an issue. Pretty sure the toe plate is titanium, and the assorted hardware in my wrist and hand are not.