MSCT后处理技术在腕关节损伤中的应用

Application of multi-slice spiral CT post-processing technique in wrist joint trauma

目的:探讨MSCT后处理技术在腕关节损伤诊断中的价值。方法:MSCT扫描腕关节损伤患者20例,分析薄层重建、多平面重组(MPR)及容积显示技术(VRT)对腕关节损伤的显示及价值,并与常规横断面对比分析。结果:桡骨远端、尺骨茎突骨折8例,合并舟状骨骨折2例,合并舟状骨骨折伴月骨脱位1例;舟状骨骨折8例;月骨脱位4例;三角骨骨折2例,合并钩骨、豆状骨骨折1例;第4、5掌骨基底部骨折各1例。MSCT三维重建图像能全面、直观地显示相应的腕关节骨折、脱位及关节腔内骨片情况,尤其是MPR对骨折、脱位、骨碎片显示率为100%。结论:MSCT通过薄层重建配合MPR、VRT能够克服横断扫描限制,在不增加患者辐射剂量的情况下,能够更加直观、立体地显示腕关节损伤的基本征象,为腕关节损伤的诊断提供更多信息。

Objectlve：To evaluate the value of multi-sllce spiral CT （MSCT） post-proceasing technique in the wrist joint trauma. Methods： Twenty patients with wrist joint trauma were studied, with MSCT. After scanning, retrospective thin-slice reconstruction, multi-planar reconstruction （MPR） and volume rendering technique （VRT） images were obtained. These images were analyzed and compared with conventional axial images. Results： Fracture of processus styloideus ulnae and distal radius was found in 8 eases, of which es seaphoideum fracture in 2 cases and of which os scaphoideum fracture and lunate dislocation in one ease. Os seaphoideum fracture was found in 8 eases. Lunate dislocation was found in 4 eases. Os trigonum fracture was found in 2 eases, of which fracture of os hamatum and os pisiforme in one ease. The fracture of basilar part of IV ossa metaearpalia in one case and the fracture of basilar part of V ossa metaearpalia in one ease. The three-dimensional reconstruction images can produce comprehensive and stereoscopic visualization of fragments and accurate classification of wrist joint fracture and dislocation or piece of fracture in the wrist joint. Rate of displaying wrist joint trauma with MPR is 100%. Conclusion：By combination with thin-slice reconstruction, MPR and VRT, MSCT can demonstrate more intuitional and trldimonsionally pathognomonie signs of wrist joint trauma,providing more information for the diagnosis of wrist joint trauma.