Chest X-rays require very little preparation on the part of the patient. You will need to remove any jewelry, eyeglasses, body piercings, or other metal on your person. Tell your doctor if you have a surgically implanted device, such as a heart valve or pacemaker. Your doctor may opt for a chest X-ray if you have metal implants. Other scans, such as MRIs, can be risky for people who have metal in their bodies. Before the X-ray, you’ll undress from the waist up and change into a hospital gown.