1998 Volume 4 Issue 1 Pages 75-80
Magnetic resonance imaging (MRI) was performed in 298 patients who were diagnosed clinically.MRI findings were evaluated by occupational ratio, location and signal intensity of herniated nucleus pulposus (NPS) in spinal canal.Clincal findings included low back pain, lower extremity pain, sensory diturbance, loss of muscle strength and straight leg raising test (SLR).Occupatinal ratio of NHP in spinal canal was a mean of 35.0±15.3 (12-100)% in saggital plane and a mean of 33.1±11.7 (11-100)% in transverse plane. Isosignal intensity was showed in 102 patients and low signal intensity in 196 patients. 82 patients was classified as mid type, 136 patients as paramid type and 80 patients as lateral type. Compared MRI findings with clincal findings, patients with occupatinal ratio of NHP in spinal canal of 40% or more have a tendency to show positive SLR, and those with 50% or more tend to show loss of muscle strength.
