What can be seen on myelogram that you can't see on mri? i have 6 herniated disk shown on mri, but neurosurgeon wants ct myelogram.

There are a variety: Of reasons: your symptoms may not match the MRI findings, not all the disc herniations may be of the same significance and this may provide additional information to clarify the surgeon's diagnosis, there may be a component spinal stenosis which is best demonstrated by a ct/ myleogram to name just a few. You should discuss this with your neurosurgeon as to the reason or reasons.

CT myelogram: While MRI scans are excellent for visualizing the soft tissues structures around the spine (e.g., discs, nerves, spinal cord), ct scans are generally superior when visualizing the bony structures (e.g., vertebra, facet joints, bone spurs). Mris can also be negatively influenced by either motion and/or metallic artifact. Conversely, ct scans can expose patients to unnecessary ionizing radiation.

Skeletal anatomy: A myelogram and post myelogram ct is a very useful study that can assist your surgeon in studying your spine anatomy, particularly the bone of the skeleton. In someone with multiple disc problems like you describe, it can help your surgeon determine your best treatment options.