Comparison of the radiation doses in lumbar CT and myelography

The radiation doses of the vertebral bodies and ovaries in lumbar CT and myelography were compared using a phantom. The CT examinations were performed with two different scanners using four different programs. At CT the radiation maximum doses of the vertebral bodies were higher than at myelography but the ovarian doses were lower. The radiation exposure does not prevent the use of CT instead of myelography, but the area of examination and the number of pictures should be limited to the minimum based on the clinical enquiry.