摘要
目的 :探讨多层螺旋CT三维重建对椎弓根螺钉置入的指导价值。方法 :在多层螺旋CT三维图像上 ,测量两具胸椎标本 (T1～T10 )椎弓根的三维定量解剖数据 ,用以指导椎弓根螺钉的置入。置入螺钉后拔出 ,用显影剂填充钉道。CT测量显影钉道的椎弓根水平位角 (PW )、椎弓根宽度 (PH)、椎弓根高度 (TSA)和椎弓根长度 (SSA )值。在实物标本上用量角器和游标卡尺测量实际值。结果 :配对资料两样本均数比较行t检验 ,CT图像与实物标本测量数据之间的差异无统计学意义 (P >0 .0 5 )。多因素设计资料方差分析证实 ,椎弓根显影钉道的TSA、SSA与其中轴的TSA、SSA之间差异无统计学意义 (P >0 .0 5 )。结论 :多层螺旋CT三维重建后测量的各解剖参数充分体现了个体化原则 ,真实可靠 ,对椎弓根螺钉的准确置入有指导意义。
Objective:To investigate the value of the guidance of three dimensional reconstruction of multislice spiral CT (MSCT) for the placement of pedicle screws.Methods:The 3D anatomical data of the thoracic spine pedicles were measured by MSCT in two human cadavers (T 1 ～T 10 ) to guide the insertion of pedicle screws.After pulling the screws out,the pathways were filled with contrast media. The PW,PH,TSA and SSA of developed pathways were measured on the CT images and also measured on the real objects by caliper and goniometer.Results:Analysis of variance demonstrated that the difference between the CT scans and real objects had no statistical significance (P>0.05).Moreover,the difference between pedicle axis and developed pathway also had no statistical significance (P>0.05).Conclusions:The data obtained from three dimensional reconstruction of MSCT demonstrate individualized standards, which are not only accurate but also significant for the successful placement of pedicle screws.
出处
《放射学实践》
2004年第5期323-326,共4页
Radiologic Practice
