Objective To discuss the the application effect of Gemstone spectral CT scan (GSICT) in postoperative examination of patients undergoing orthopedic surgery, and compare the difference in imaging of the two methods.Methods 32 patients who received orthopedic treatment between May 2014 to March 2015 in our hospital were selected. Among the 34 patients, 20 patients underwent metal fracture ifxation, 12 patients underwent internal ifxation of artiifcial joint. All the 34 patients received GSICT scan. The GSIViewer software was used for the analysis of the scan results. Three-dimensional images restructuring was carried out, metal artifact was removed. The images were then compared with the images obtained from conventional CT scan.Results Compared with images obtained from conventional CT scans, the GSICT has signiifcantly better imaging quality: metal artifacts were signiifcantly reducing, the reduction of fractures and the repair effect of artificial joints and internal fixation were clearly presented.Conclusion GSI CT scan at a high keV area can reduce beam-hardening artifacts and metal implants artifacts. The 100~140 keV is the optimal imaging range. In the process of conducting the postoperative imaging of the ifne structures, imaging quality can be improved by taking full advantage of the reasonable range of GSICT.%目的：探讨宝石能谱CT（GSICT）在骨科患者术后检查中的应用效果，比较该方法与常规CT扫描的图像差异。方法选取2014年5月~2015年3月于我院骨科进行治疗的32例患者，其中20例行骨折金属固定术，12例行人工关节固定术，均对其行GSICT扫描。采用GSIViewer软件分析扫描结果，并对图像进行三维重组及金属伪影去除，与常规CT扫描图像进行对比。结果与常规CT扫描图像相比，GSICT成像质量明显较高，金属伪影明显减少，可清晰呈现骨折复位、人工关节以及内固定术的修复效果。结论在高的keV区，GSICT扫描可有效减少射线束硬化伪影以及金属植入物伪影，100～140 keV为其成像最佳区间。在术后细微结构的成像时，充分利用GSICT的合理区间可提高成像质量。
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