The Characteristics And Clinical Significance Of CT Volume Rendering Technique For Lower Lumbar Nerve Root With Adjacent Bone Structure Of Normal Adult

ObjectiveUse64CT volume rendering technique to image. To observe and analyze the characteristics of normal adult lower lumbar nerve root with adjacent bone structure in two dimension, to provide Clinical value Imaging material for interlaminar Full-endoscopic assited small channel technology.MethodsThis study included60normal adult without spinal complaints (28females,32males; age range from20to59years; average age:39.77±9.70years),who were referred between September and November2011to our hospital for physical with64Row Spiral CT scans of the lumbar spine. Parameters included:the straight distance from nerve root to the inferior edge of pedicle(RSD), the vertical distance from nerve root to the superior edge of vertebral laminae (LSRD), the vertical distance from nerve root to medial edge of the facet (LMRD), the vertical distance from nerve root to the superior edge of pedicle (PSRD), the vertical distance from nerve root to the inferior edge of pedicle (PIRD), the angle between nerve root and dura mater (RA), and the vertical diameter (VD) and longitude diameter (LD) of interlaminal space. Each parameter was statistically analyzed.ResultNo side-related significant difference was noted at any segment with respect to parameters (P>0.05). There were four types according to the position of nerve root and interlaminal space:superior edge with medial, superior edge with outside, inferior edge with medial and inferior edge with outside. However, there was statistical significance with adjacent segment parameters (P<0.05). The values of RSD,LSRD,LMRD,PSRD, PIRD, RA,VD and LD increased gradually from L4to S1; on the contrary, the RA decreased gradually from L4to S1, so that the length of nerve roots in the spinal canal increased gradually.ConclusionThe morphology of the lower lumbar nerve root and interlaminal space can be accurately and intuitively detected by CT volume rendering technique, which can be used for the surgical treatment of Lumbar disc herniation with full-endoscopic technique.