A myelogram is an x-ray study of the spinal canal, which houses the various nerves, which make up the spinal cord. A myelogram can be of the neck, lower back or upper back. After cleaning the skin, a topical anesthetic is injected into the skin in an area that will be studied. The radiologist will then do a spinal (or lumbar) tap to allow the injection of the contrast medium. He will then inject the contrast medium into the spinal canal while watching it enter the canal under the Fluoroscope. If a lumbar myelogram is being done, the radiologist will then proceed to take several films using fluoroscopy while keeping you flat, or possibly tilting the table slightly feet down. If a thoracic or cervical myelogram is what your doctor has ordered, the table will be tilted head down until the radiologist has determined that the contrast has reached the proper area.