Abstract
We report the image produced by C. S. F. (cerebrospinal fluid) blockage of the lumbar spine using MRI. It is best seen by the short S. E. (spin-echo) image and not the long S. E. image. The findings are as follows: 1) a lower convex margin over the blocking level, 2) increase of signal intensity in the blocking part, and 3) liquor pooling under the block level with intermediate signal intensity. We compared the blocking of myelography with that of MRI in 82 cases who were operated. As a result we found that MRI in cauda equina disturbance cases was of nearly the same value in diagnosing blockage as myelography. However slightly more false positives were seen with MRI than myelography.
