下腰椎软骨终板的形态测量及其临床意义

目的　探讨螺旋CT三维重建测量下腰椎软骨终板的方法 ,为下腰椎椎间盘疾病诊断及治疗提供一种定量检测指标。方法　福尔马林浸泡尸体脊柱标本 2 8例 ,分别采用螺旋CT扫描。扫描范围自L3 上缘至S2 上缘 ;扫描条件 :12 0Kv ,15 0mAs,成像矩阵 5 12× 5 12 ,FOV16cm ,层厚 1mm ,螺距 1 0 ,Pitch 1 0。利用O2图像工作站将原始扫描图像进行多平面重建(MPR) ,再在MPR重建的基础之上行曲面重建 (CPR) ,勾画出软骨终板的轮廓 ,然后测量软骨终板的最大矢状径、横径、面积、周径、形态。结果　L3 下缘至S1上缘软骨终板由类“心形”渐渐变为“椭圆形” ,作者还提供了L3 至S1软骨终板的所有测量参数。结论　螺旋CT三维重建方法用来评估椎间盘软骨终板简便、易行、可靠性好 ,为临床椎间盘疾病的诊断及治疗提供一种新的定量测量方法

The Morphology Measure of the Lower Vertebral Endplate Shape Using Spiral CT and Its Clinical Significance

Objective To discuss the method of spiral CT three -dimensional reconstruction(3DR) for morphology measure of the lower vertebral endplate shape and look for a ration method for the clinical diagnosis and treatment of vertebral disc disease.Methods Twenty eight cases of human cadaver lumbar vertebral were scanned by using spiral CT and three dimensional reconstructions (3DR). Scan range was from superior L 3 to superior S 2.Scan station, W300,C80,Zoom=1 5,protocols as below:120Kv,150mAs, FOV160mm, thick1mm,pitch 1 0,Expandl. Original images were carried through 3DR by using O2 image work station.Intervertebral disc maximum anteroposterior,transverse diameter,circularity,area and shape index were measurement based on curve planar reconstruction(CPR ).Results The endplates resembled a cardioid at the inferior L 3 level and became more elliptical toward the superior S 1 level.All protocols the endplates of inferior L 3, superior and inferior L 4?L 5, and superior S 1 are provided.Conclusion Spiral CT scan and 3DR are easier and credibility method for morphology measure of the lower vertebral endplate shape, it offers a new ration method for the clinical diagnosis and treatment of vertebral disc disease also.