This technology allows your doctor to have the clearest possible look at your internal anatomy. MRI does not use X-rays or radiation. Instead, it uses a powerful magnetic field and radio waves to provide computerized images, which appear as “slices” of the anatomy. From these pictures, the radiologist can determine the differences between healthy and abnormal tissue. The MRI procedure is simple and safe. One of its main benefits is that a lot of information can be obtained through a painless test.