摘要
多层螺旋CT将原始数据薄层重建后于工作站进行后处理,重建方法有二维多平面重建、曲面重建、三维表面遮盖法重建、最大密度投影及容积再现投影等。64层螺旋CT几项的关键参数包括探测器的参数、时间分辨率、空间分辨率、密度分辨率、高压发生器参数及球管的热容量。其性能指标受多个参数的综合影响,平衡配置探测器、高压发生器和球管才能使CT具有更高的时间分辨率和扫描覆盖率。多层螺旋CT多平面重建及三维重建图像作为轴位图像的重要补充,能主体、直观地显示骨折的情况,是一种快速无创伤性显示关节周围骨折的最佳方法,为制定手术方案提供可靠的依据。术后重建图像能清晰显示骨折内固定物的形态、位置及骨折复位情况。对骨关节外伤治疗方案的选择及估计预后具有重要价值。
Following thin slice reconstruction by multi-slice spiral CT, the initial data were processed in workstation. Reconstruction methods include two-dimensional multi-plane reconstruction, contour reconstruction, three-dimensional surface shielding, maximum density projection and volume rendering technique. The key parameters of 64-slice spiral CT involve parameters of monitor, time resolution, space resolution, high tension generator and thermal capacity of sucker. Its performance is influenced by many parameters. A balance of monitor, high tension generator and sucker can improve CT time resolution and rendering range. Multi-slice spiral CT multiplanar reconstruction and three-dimensional reconstruction image as important supplement of axial images can directly display fracture condition, and best and rapidly present joint peripheral fracture, providing reliable evidence for surgical protocol. Postoperatively reconstructed images can clear display internal fixtor appearance, location and fracture reduction, and is significant for surgical protocol and prognosis evaluation.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2008年第30期5931-5934,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
