CT scan of the spine for herniated discs.

The high resolution conversion kit introduced for the EMI CT 5005 scanner has twice the spatial resolution of the usual scan mode and has proven to be quite useful in evaluation of the spinal canal. The present study was performed to determine the capability of the high resolution system to diagnose herniated lumbar disc without intrathecal contrast. HNP was diagnosed in 83% of the cases which had a positive myelogram, 70% of which had operation and all were proven positive.