As part of our screening process, it is very important that we find out what types of implants a patient may have. There are types of implants that are never a problem and there are implants that are incompatible with the MRI unit, which prohibit a patient from ever having this type of exam. In addition to asking about implants, it is also very important for us to find out if there is any metal in a patient's body due to an injury or accident. If so, we must take precautionary steps to ensure that the shrapnel or other metal in the patient's body does not compromise their safety.