Application value of two different CT scanning methods for diagnosis of lumbar spondylolysis

Objective To explore the application value of two different CT scanning methods for diagnosis of lumbar spondylolysis. Methods To analyze 50 cases of CT manifestations of lumbar spondylolysis by routine scan(base-line perpendicular to the pedicle) and angle scan(base-line parallel to the vertebral arch) respctively, including scanning the whole vertebral arch, 3 mm thickness, 3 mm interlayer. Results CT imaging manifestation of lumbar spondylolysis acquired respectively with two kinds of scanning methods were different. Routine scan showed 46 cases of lumbar spondylolysis, 2 cases of suspicious, 2 cases did not see. However, it showed more clearly for deformation, vertebra canal stenosis, dural sac and nerve root compression. Angle scan clearly showed that 50 cases with lumbar spondylolysis, lumbar spondylolysis crack width, hyperplasia of hardening and the surrounding bone block, but for stenosis, dural sac and nerve root compression were worse than routine scan. Conclusion Two different CT scan methods have advantages and disadvantages in the displaying of lumbar spondylolysis and all secondary change, combined two kinds of scanning methods can, show objectively lumbar spondylolysis and secondary change, which has application value in diagnosis of lumbar spondylolysis.