多层螺旋CT三维重组技术在颈椎损伤中的应用

目的:探讨多层螺旋CT(MSCT)三维重组诊断颈椎复杂骨折的临床应用价值。方法:对31例颈椎外伤的患者行多层螺旋CT扫描,薄层重建后利用工作站行多平面重组(MPR)或曲面重组(CPR)、表面遮盖法(SSD)、容积再现(VR)和透明化X线模拟投影技术(4D)的三维重组。结果:SSD、VR和4D对于颈椎较大、移位较明显的骨折显示较好,图像立体感强,直观;MPR可以较全面、细致地显示骨折、移位情况。本组三维重组CT图像清晰、立体、直观地显示31例患者骨折的部位、范围、骨块的移动方向和距离,使得治疗中得以正确地选择接骨板及其放置位置和切口位置。结论:恰当地运用多层螺旋CT图像重组功能,可清晰显示颈椎的空间解剖关系,较为全面、直观、准确地显示骨折情况,对手术方案的设计与实施具有积极的指导意义。

Value of Multi-slice Spiral CT with Postprocessing Techniques in the Assessment of Complex Cervical Vertebral Fracture

Objective:To explore the value of postprocessing techniques of multi-slice spiral CT (MSCT) in the assessment of complex cervical vertebral fracture. Methods:Thirty-one patients with complex cervical vertebral fracture were scanned with MSCT and the source images were transferred to work-station for post-procession.Techniques used include multiplanar reformation (MPR),curved planar reformation (CPR),shaded surface display (SSD),volume rendering (VR) and 4D displays.Results:With SSD,VR and 4D techniques,fractures with obvious displacement of fracture segments can be displayed vividly while MPR and CPR can depict fractures comprehensively.CT images obtained with post-procession techniques clearly revealed the location and type of fracture,the direction and distance of displaced fracture fragment and the relationship to surrounding tissue.Conclusion:MSCT with postprocessing techniques can display complex cervical vertebral fracture accurately.