CT Myelogram
A myelogram CT combined is the most accurate test for evaluating
nerve root compression. It is generally reserved for patients with multiple level
pathology, patients with prior spinal surgery, or when mechanical instability is
suspected. In most other cases, an MRI is usually diagnostic, and because it is not
invasive, it is the preferred test for straight-forward spinal disorders.
Myelogram is a test which is used in
conjunction with a CT scan. Under local anesthesia, the doctor injects a dye into the
patient’s spinal canal. Many x-rays are then taken. The dye allows the spinal canal
to show up white on the x-ray. These pictures help the doctor to identify areas of nerve
compression within the spine. CT scanning is then used to create cross sectional images of
the spine. This method is superior to plain CT because the dye shows abnormal areas more
vividly. This test is particularly useful to help diagnose spinal stenosis.
Myelograms are performed at the
hospital. They take approximately one hour to complete. After the test, you will be
monitored until ready to go home. You will need someone to drive you home. Unlike the
other diagnostic studies, due to the invasive nature of the study, patients may experience
headaches, allergic reactions to the dye, or other minor side effects. Once home from the
test your activity will be limited to reclining with your head propped up for 48 hours. No
strenuous activities are allowed for approximately one week. Be sure to follow the
specific directions provided by the doctor performing the test. |
