An important contraindication to MRI (magnetic resonance imaging) is having metal objects anywhere near, and most especially inside the field of, the MRI scanner. Not only does this entail that people with implanted metal plates, bone screws (internal fixation), or syndesmotic screws often cannot undergo MRI, it also entails that many everyday objects, including jewelry, belt buckles, wallets, purses, security guards' weapons, and so on, must be kept out of the MRI area.