MRI is the method of roentgenologic examination of the subarachnoid space of the spinal cord with the introduction of a contrast agent into the spinal canal to determine its patency. MRI is used to detect tumors of the spinal cord, inflammatory diseases of the meninges, protrusions of intervertebral disks.
MRI radioisotope is a research technique with which determine the location of obstacles (tumor, adhesions)violates the patency of the spinal canal. For myelography radioisotope in Podporina space of the spinal cord via lumbar puncture impose a bubble of air mixed with radioactive gas - 3-5 mccoury radon or 5 - 10 mccoury radioactive xenon - He. When sitting or lying position of the patient on the table with a raised head end see the upward movement of radioactive gas using radiometric instruments (see Counters, nuclear radiation), the registration of gamma-radiation (see). The place where ceases to detect the radiation corresponds to the lower limit obstacles. To explore the region of lower lumbar, the patient is placed in a position with a raised pelvis. If a gas bubble does not reach the blind end of the spinal canal, the place stop shows the top border obstacles. Cm. also Radioisotope diagnostics.