低剂量CT扫描技术在距骨骨折的应用价值研究

Application of low dose CT scanning reconstruction in talus fractures

目的评价低剂量CT扫描技术在距骨骨折的临床价值。方法使用飞利浦64排128层螺旋CT扫描仪,选取距骨骨折患者180人,随机分作两组。常规剂量组使用管电压120 kV、管电流250 m As,低剂量组使用管电压100 kV、管电流100 m As,进行距骨扫描。记录两组扫描的容积CT剂量指标(CTDIvol)和剂量长度乘积(DLP)。由两位主任医师对影像质量运用双盲法进行评分取平均值。统计方法采用秩和检验、方差分析。结果两组患者的影像质量均满足要求,无统计学意义(p>0.05);低剂量组较常规组的辐射剂量显著减少,存在明显差异(p<0.05)。结论低剂量(100 kV、100 m As)组扫描满足临床诊断要求的同时明显降低病患者的辐射剂量。

Objective To study the value of low-dose CT scanning in talus fractures. Methods Using PHILIPS64-row 128-slice spiral CT scanner, 180 patients with fracture of talus were selected and randomly divided into2 groups. Conventional dose group applied 120 k V tube voltage and 250 m As tube current, while low dose group applied 100 kV tube voltages and 100 m As tubes current to scan talus. Volumes CT dose indexes(CTDIvol)and dose length product(DLP) of the two groups of CT scanning modes were recorded. The image quality was independently scored and averaged by two senior physicians using double blind method. Statistical methods were rank sum test and variance analysis. Results The image quality of the two groups of patients could meet the diagnostic requirements without statistical significance(p>0.05). The radiation dose of the low dose group was significantly lower than that of the conventional group, with significant difference(p>0.05). Conclusion The low dose scanning techniques meet the requirements of clinical diagnosis and significantly reduce the radiation dose of patients.