In cases where the nerves must be examined, some doctors may choose to combine
the CT scan with a myelogram. A myelogram is a procedure in which a radiographically
opaque dye (dye that shows up on x-rays) is injected into the sac around the
nerve roots. The nerve roots then light up on the CT image. The combination
of these two procedures provides excellent, extensive detail about the nerves
and nerve roots.
