A Magnetic Resonance Imaging scan incorporates the computer and magnetic fields to generate images of internal anatomy. The test does not require any injection of contrast into the arm (unless prior spinal surgery or because of tumor or infection). The M.R.I. is a non-invasive test which can visualize structures in the spine (bone, nerves, spinal cord) and surrounding areas. Nerves, spinal cord, discs, bone, etc or demonstrated on this test. The M.R.I. is frequently performed for a specific anatomic region of the spine (cervical, thoracic, lumbar). The MRI scan is performed by rotating a magnet producing activity in hydrogen atoms. The energy emitted in the process of excitation and relaxation is imaged by the scanner.