摘要
目的:探讨L5椎弓根轴线角度和在椎体内空间投影位置对经皮椎弓根入路椎体成形术的指导意义。方法:选30个成人正常L5干燥骨标本,多排螺旋CT连续横断扫描,选择椎弓根最宽层面,资源图像输入GEADW4.1工作站作多平面重组方式重建,测量①椎弓根轴线与椎体矢状面夹角(E角);②椎弓根轴线与椎体上缘平行线夹角(F角);③椎弓根轴线矫正角(G角);④椎弓根轴线远端在椎体内投影位置。结果:E角左右分别为34.7°±2.5°、34.9°±3.0°;F角左右分别为3.4°±0.7°、3.0°±0.8°;G角分别为24.4°±2.2°和24.0°±2.5°,左右两侧差别无显著性意义(P>0.05);椎弓根轴线远端在椎体内的投影均位于椎体前上部分;椎基底静脉管均位于椎体后中央区。结论:CT重建研究得出了椎弓根E角、F角和G角参考数值,以及椎弓根轴线远端和椎基底静脉管在椎体内的位置,对经椎弓根入路的PVP手术具有指导意义。
Objective： To investigate the clinical significance of axial line angle of pedicle of L5 vertebra and its projection site at vertebral body for PVP procedure. Methods： 30 dry L5 vertebra specimens of adult were used. The Continuous volumetric data under spiral CT scan were obtained. The widest layer was selected as pedicle＇s reconstructing plane during continuous images and the source images were reconstructed with multiplane reformation （MPR） in GE AW4.1 workstation. The following parameters were measured. ①Angle between pedicle axis line and vertebral sigittal plane （E angle）; ②Angle between pedicle axis line and parallel line of upper endplate （F angle）; ③Rectified angle of pedicle axis line（G angle）; ④Space projective location at vertebral body of distal end of pedicle axis line. Results： Through three-dimensional measurement of thirty L5 vertebrae with spiral CT scan, the data of pedicle axis line were as follows： E angle was about 34.7°±2.5°（lefi） and 34.9°±3.0°（right）, F angle 3.4°±0.7°（lefi） and 3.0°±0.8°（right）, G angle 24.4°±2.2°（lefi） and 24.0°±2.5° （right） respectively. Statistic analysis showed that differences between left and right pedicle were not found to be statistically significant. Space site of distal end of pedicle axis line at vertebral body located at the anterosuperior part of vertebral body. The tube of vertebral basilar vein located at the posterior center of the vertebral body. Conclusions： Through dimensional study of L5 pedicle axis line under spiral-CT scan and three-dimensional reconstruction, reference values of E, F, G angle of pedicle axis line were established, while space projective location at vertebral body of distal end of pedicle axis line and tube of vertebral basilar vein were found. This information may be useful for instructing transpedicular PVP procedure.
出处
《中国临床解剖学杂志》
CSCD
北大核心
2007年第2期160-162,共3页
Chinese Journal of Clinical Anatomy
关键词
L5椎体
椎弓根
三维测量
螺旋CT
PVP
L5 vertebrae
pedicle
three dimensional measurement
spiral CT
PVP
作者简介
李子祥（1962-），男，山东人，硕士，副教授，主要从事CT诊断和介入治疗，Tel：（0532）82911257，E-mail：zixiangli@yahoo．com．an.
[通讯作者]刘丰春，教授，Tel：（0532）82911381，E-mail：liufc2008@yahoo．com．cn
