MRI   Magnetic Resonance Imaging (MRI) generates images of the body without using radiation. Instead an MRI uses strong magnets and radio waves to create an image. In many cases, such as with the brain, an MRI provides the best detailed image available. In other instances, a CT Scan may be more effective, depending on the part of the body being evaluated. This examination may require some preparation. Your physician's office may schedule your appointment Monday - Friday at the Salem MRI Center. Preparing for Your MRI Examination