Cobalt chromium alloy stents are magnetically inert stents, so they can do MRI. Cobalt-chromium alloy, like titanium alloy, is mostly used in clinical hip replacement, cerebral artery stents, porcelain teeth, etc. Because it is magnetically inert and has little effect on the magnetic field, patients with cobalt-chromium alloy on their bodies can have an MRI. The farther away the cobalt chrome alloy is from the magnetic field, the less it affects the magnetic field. Cobalt chrome alloys will generally only be found in one part of the patient’s body. If the part of the patient’s body that needs to be MRI’d is located at the far end of the cobalt chrome alloy, the alloy will basically have no effect on the patient’s MRI results, and therefore the patient can be MRI’d. Although the cobalt chromium alloy has very little effect on the results of the MRI, it is still recommended that the body part to be examined for the MRI be located at the distal end of the cobalt chromium alloy. With cobalt chromium alloy stents, it is important to fully communicate with your doctor before having an MRI.