neurologic disorders
Other Neurologic Imaging Studies
Myelography
X-rays are taken after a radiopaque contrast agent is injected into the subarachnoid space via lumbar puncture. MRI has replaced myelography for evaluation of intraspinal abnormalities, but CT myelography is still done when MRI is unavailable. CT myelography can provide more detailed images of the spinal cord and surrounding bone than MRI. Lumbar Puncture (Spinal Tap) are the same as those for lumbar puncture. Myelography may exacerbate the effects of spinal cord compression, especially if too much fluid is removed too rapidly. Rarely, myelography results in inflammation of the arachnoid membranes around the spinal nerves (arachnoiditis), which may cause chronic pain and paresthesias in the lower back and extremities. 