X rays are standard procedures and involve almost no preparation from the patient. Depending on the area under review, you may want to wear loose, comfortable clothing that you can easily move around in. You may also be asked to change into a hospital gown for the test. You will be instructed to remove any jewelry and other metallic items from your body before the X ray is taken. You should always tell your doctor if you have any metal implants from prior surgeries. These can block the X rays from passing through your body.If your test requires contrast dye, a doctor or nurse will give it to you as an injection, an edema, or a pill to swallow before the test. If your X ray is examining your intestines, your doctor may tell you to fast for a certain amount of time beforehand, or to clear out your bowels.