Your doctor or our staff will provide specific instructions to prepare you. Different exams require different preparation. There is no preparation for a routine x-ray exam. Wear loose-fitting clothes without zippers, buttons, clasps or any metal. It is best not to wear jewelry, since you will be asked to remove it. If you are scheduled for a diagnostic x-ray that requires a contrast agent, such as barium or iodine, you may be restricted from eating before the test.